I like Earthshattering Swing the most Could also see a variation Earth Pounding Spell Damage 4 Range 0 Effect damage all adjacent characters. All damaged character takes Slide 1. All adjacent space become Spiked Terrain.
On the topic of linear melee, it's also sometimes interesting to see charge attacks do this too, where you have the opportunity for multiple targets and pop out the other side. I think the pinning dart is still my favorite concept. A punishment for wearing clothes seems unique, especially since the damage will probably be mitigated and all you're left with is a tricky status effect. If other characters count as blocked terrain, that could maybe make this a little too powerful or confusing, though... but would it be fun to explore an attack that punishes enemies for grouping together by binding them?
Here are 3 cutting cards I would like to see. Hamstring Cut Slash, Melee Encumber 2, Duration 2 Damage 4 | Range 1 Bleeding Cut Slash, Melee Bleed 2, Duration 3 (Bleed is like burning or poison) Damage 5 | Range 1 Cut Back Slash, Melee After making the attack, gain Step 2 Damage 5 | Range 1 (this would work nice in a Rogue class too. Name is punny) =============== Also a quick brainstorm Kneen Breaker Bash, Melee Encumber 4, Duration 1 Damage 6 | Range 1 Hand Breaker Bash, Melee Weaken 2 (weakens is like reverse Frenzy, where target deal 2 less damage on their melee attacks), Unblocked 2 (Decrease 2 from any block roll). Duration 2 Damage 4 | Range 1
Some priest spells. About those 2 last cards, I'm not sure if they are too OP or not. But it can be easily nefted by increasing the duration.