Card Ideas

Rewind
Magic Arcane, Utility?
Play Effect: 'Target character is placed in the position they were in at the start of the round, and their health is set to what it was at the start of the round. May self target.'

 

Yep, exactly. It only cancels the potential damage. The terrain attachment is still staying there. Maybe a human/dwarf/elf skill and boots can have that.

 

Magma Flow
Magic Fire Attack, Gold Quality
Play Effect: 'Target square becomes Flowing Magma Terrain (Stop; at the start of each round, occupant takes 5 Fire damage; at the start of each round, each adjacent square that is not Flowing Magma Terrain becomes Flowing Magma Terrain, Duration 2). Duration 2.
Flavour Text: 'The magma surged towards us, consuming all in its path in a tide of unstoppable fiery destruction.'

 

Hidden Cards
Boost, Gold Quality
Play Effect: 'Trait. Attach this card to yourself, Duration 3. Your opponent cannot see how many cards you have in your hand or what any of those cards are.'

 

Disable Gravity
Assist, Silver Quality
Play Effect: 'Attach 'Hover' to all characters.'

 

Facepalm. This would be almost useless because you can keep track of the cards they draw and discard, and cards previously revealed must still be in hand.

 

Yes, you can still keep track of their hand, this card just makes it significantly harder to do so.

 

This is my feedback for the Hidden Cards card idea. (WARNING: Wall of text inside spoiler)

Spoiler: My Feedback

It would not be that much harder to keep track of your opponent's hand. Most ways of drawing or discarding cards always draws or discards a certain amount (Inspirational Thinking) or will continue until a certain amount (End of round discarding). There are a few cards that can make it hard to keep track (They can draw or discard cards from 0 to X):
-Elven Maneuvers (0-1 cards). -Inspirational Thinking (0-1 cards). -Pathfinding (0-2 cards, but mostly likely 2 considering it goes until your deck is empty)
-Boiling Armor (0 to your entire hand). -Counterspell's Offensive Effect (0-2 cards)
-Forgetfulness (0-2 cards). -War Cry (0 to your entire hand)
-Dissolve Armor (0-1 cards, but multiple armor cards can reveal that you discarded 1 card)
-Melt Armor (0-1 cards, but multiple armor cards can reveal that you discarded 1 card) -Mind Leak (0-1 cards every time you take damage). -Acid Terrain (0 to your entire hand)
-Sundering Strike (0 to entire hand, armor cards not discarded by this would be shown to the opponent)
(Cards in italics discard instead of draw)
There might be a few cards I am missing (I am only including player cards). Out of these cards, only three would benefit you as well as possibly confusing the opponent (Playing any of the cards in italics against yourself would not be worth it). If you did confuse your opponent, would would have to beware some specific cards so to keep your opponent from understanding your hand better:
-Punishing Bolt. -Punishing Strike. -Touch of Death. -Purge's effect. -Ouch!. -Brain Burn
-End of Round Blind Rage. -Taking damage while Raging Strike is in hand. -End of Round
-Getting 3 new cards attached to you
(Anything in italics would be stuff coming from your own hand (or radiation cards (both monster and player cards)). Anything in Bold would immediately end the overall effect).
I could be missing a few things from this list too. The most major problem with this card is the battle log. Since the battle log shows when any character draws or discards cards and shows every action in the match, it would seem strange for it to not show one character drawing or discarding cards. This card would at least render "Scouting Run" "Elvish Insight" and "Obvious Maneuvers" useless against that character.
My recommendation: Change the effect to "Trait. Whenever a card in your hand would be revealed, but not discarded, by enemy cards or from an effect from your hand, hide it and shuffle the cards in your hand after the effect triggers" and lower it's rating down to bronze. (This would still be a bad card, but it would not cause much problems with the battle log).

Side Note: For your Magma Flow card: There should not be a card that can (eventually) flood the board with terrain that basically ends up replacing itself (If it is not removed at the end of the round, a few cards could still remove it. After a second, it would take 4 cards (They cover a 3x3 area). At this point, both sides would have to work together to control this.
My recommendation: Increase the damage to at least 8 and change it's end of round effect to "At the end of the round, adjacent squares become lava terrain (at the end of the round, occupant takes 8 fire damage, duration 2) if this card was played within the last turn".
Your Disable Gravity card is good, though it might be a bit weak for silver quality.
/SPOILER]Sorry for the wall of text, this is my overall feedback for Hidden Cards card idea.

It would not be that much harder. Most ways of drawing or discarding cards always draws or discards a certain amount (Inspirational Thinking) or will continue until a certain amount (End of round discarding). There are a few cards that can make it hard to keep track (They can draw or discard cards from 0 to X):
-Elven Maneuvers (0-1 cards). -Inspirational Thinking (0-1 cards). -Pathfinding (0-2 cards, but mostly likely 2 considering it goes until your deck is empty)
-Boiling Armor (0 to your entire hand). -Counterspell's Offensive Effect (0-2 cards)
-Forgetfulness (0-2 cards). -War Cry (0 to your entire hand)
-Dissolve Armor (0-1 cards, but multiple armor cards can reveal that you discarded 1 card)
-Melt Armor (0-1 cards, but multiple armor cards can reveal that you discarded 1 card) -Mind Leak (0-1 cards every time you take damage). -Acid Terrain (0 to your entire hand)
-Sundering Strike (0 to entire hand, armor cards not discarded by this would be shown to the opponent)
(Cards in italics discard instead of draw)
There might be a few cards I am missing (I am only including player cards). Out of these cards, only three would benefit you as well as possibly confusing the opponent (Playing any of the cards in italics against yourself would not be worth it). If you did confuse your opponent, would would have to beware some specific cards so to keep your opponent from understanding your hand better:
-Punishing Bolt. -Punishing Strike. -Touch of Death. -Purge's effect. -Ouch!. -Brain Burn
-End of Round Blind Rage. -Taking damage while Raging Strike is in hand. -End of Round
-Getting 3 new cards attached to you
(Anything in italics would be stuff coming from your own hand (or radiation cards (both monster and player cards)). Anything in Bold would immediately end the overall effect).
I could be missing a few things from this list too. The most major problem with this card is the battle log. Since the battle log shows when any character draws or discards cards and shows every action in the match, it would seem strange for it to not show one character drawing or discarding cards. This card would at least render "Scouting Run" "Elvish Insight" and "Obvious Maneuvers" useless against that character.
My recommendation: Change the effect to "Trait. Whenever a card in your hand would be revealed, but not discarded, by enemy cards or from an effect from your hand, hide it and shuffle the cards in your hand after the effect triggers" and lower it's rating down to bronze. (This would still be a bad card, but it would not cause much problems with the battle log).

Side Note: For your Magma Flow card: There should not be a card that can (eventually) flood the board with terrain that basically ends up replacing itself (If it is not removed at the end of the round, a few cards could still remove it. After a second, it would take 4 cards (They cover a 3x3 area). At this point, both sides would have to work together to control this.
My recommendation: Increase the damage to at least 8 and change it's end of round effect to "At the end of the round, adjacent squares become lava terrain (at the end of the round, occupant takes 8 fire damage, duration 2) if this card was played within the last turn".
Your Disable Gravity card is good, though it might be a bit weak for silver quality.

 

Wall of Text
Attack, Magic Psychic, Range 6, Wizard Card. Target three adjacent squares become wall of text terrain (Stop, at the end of the round, all characters within 4 squares and facing the wall of text terrain take 3 penetrating psychic damage. Occupants take 6 penetrating psychic damage instead. Duration 2)

If you were to create this in the middle of a crowded town square, most people would run around in a panic. Their minds simply cannot handle that many words.

 

@Super4011:

After reading your reply, I agree with your recommendation for 'Hidden Cards'. Your idea sounds a lot better than mine!
Regarding 'Magma Flow', I have realised that I accidentally missed out a crucial part of the card effect. It should have been: 'Target square becomes Flowing Magma Terrain (Stop; at the start of each round, occupant takes 5 Fire damage; at the start of each round, each adjacent square that is not Flowing Magma Terrain becomes Flowing Magma Terrain, Duration 2). Duration 2.' Therefore, instead of flooding the entire board, the Flowing Magma Terrain would move in a wave across the board, affecting only a certain number of squares. I quickly made a few diagrams to illustrate this.

Spoiler: Diagrams

Key:
Grey = normal terrain
Light red = flowing magma terrain, duration 2
Dark red = flowing magma terrain, duration 1

I've changed the card effect in my post.

 

What prevents dark red in diagram 3 from making the square in top right a duration 2 flowing magma? Iirc, effects happen before duration is counted down. If you want it to work at all well, make it duration 1.

 

Maul Bash

Melee attack - Type crushing
Range 2 - Damage 8
Slide Back 2

Warhammer Strike

Melee attack - Type piercing
Range 2 - Damage 8
Penetrating, Slide Back 1

 

Glue

Magic assist - Type arcane
Create glue terrain (Stop any character that is in a glue terrain) - Duration 2
Burst 1

 

Prepare Weapon
Support, Warrior Card. Draw a card, discard it unless it is an attack card, repeat until you draw two attack cards or three cards are drawn, then attach to yourself: (Frenzy 2, Duration 2).
Blind Striking
Attack, Warrior Card. Discard a random attack card that has a base damage, then deal the card's base damage to every adjacent character and half of it to yourself with the same damage type as the card discarded. This card cannot be used if you do not have another attack card that has a base damage in your hand, add 2 to blocks against this attack.
Throw Weapon
Attack, Projectile Crushing, 0 Damage 4 Range, Warrior Card. Discard all attack cards in your hand, for every attack card discarded this way, increase the damage of this attack by 4.
Burning Overload
Attack/Handicap, Wizard Card. Your square and adjacent squares become lava terrain (At the end of the round, occupant takes 8 fire damage) and deal 3 fire damage to all characters within 3 squares, draw a card. Mandatory Action
Shock Cone
Attack, Magic Electric, 1 Damage, 6 Range, Wizard Card. Cone, adjacent targets take 2 extra damage, non-adjacent targets within 3 spaces take 1 extra damage, targets take 1 extra damage for each character adjacent to them who also got hit with this attack, attach to characters that take 5 or more damage from this attack: (Stun, Duration 1).
Banish From Dimension
Utility, Range 5, Wizard Card. Attach to target character (Stun, Halt, this character cannot be targeted and is unaffected by cards played by other characters, terrain, or other cards attached to this character, when this card expires or is removed in any way, target moves 3 randomly, Teleport, and set it's facing randomly, Duration 1)
Peacekeeper's Strike
Attack, Melee Crushing, 6 Damage, 1 Range, Priest Card. For each attack card in the target's hand, deal 2 unbuffable, penetrating holy damage after the attack.
Unpreventable Death
Handicap, Priest Card. Trait, attach to yourself: (At the end of each round, take 3 unpreventable unholy damage and increase the duration of this card by 1, if this card is removed from this character in any way, reattach it, Duration 5).
Equilibrium
Support, 8 Range, Priest Card. Heal 4, if the amount of holy cards and unholy cards in you hand are equal, you Heal 8, target heals 8 instead, and all other characters heal 4.

 

Warhammer Strike
Attack
Range 2 | Damage 10
Affects all characters within two squares except yourself.
His mighty Hammer sowed chaos all over the battlefield, as blood and tears fell everywhere like rain.

 

Those are really good!

 

Shish kabob
Melee piercing
Range 2
Linear
Damage 9

 

Name: Shield Bash
Quality: Good (4/7)
Rarity: Uncommon
Expansion: Lorth's Idea
Color Class: Attack, Block
Attack Type: Melee
Damage Type: Crushing
Damage: 4
Range: 1
Reaction 1: Block Any
Play Effect 1: Slide Back 1
Chance: 50%

 

Mana Spike
Mandatory Action
Damage 4 Range 6
If you cannot target another character do 4 unpreventable arcane damage to yourself.

 

Berserker's Armor

Armor 2 - Roll 4+
Anytime this armor fails to protect from range 1 or 2 attacks, create a random melee attack in both attacking and defending characters hand
Keep