https://i.imgur.com/2dk2owI.jpg Can someone explain why I can't use Unstable Bolt on the kobold warrior? Thanks!
It looks like that character has the Squeamish handicap attached, which prevents you from playing a card on a target whose health is less than or equal to the card's base damage. Since the kobold only has 4 health, you can't target it with a 4 damage Unstable Bolt.