I like where his hearts at, since promoting playing Goblins that cost two or more is kind of a plus
Exchange specifically is interesting, as the drawback of not being able to attack with the monster in the same turn is superfluous, since this drawback already exists on every toon monster
As your deck can do enough self pain to potentially kill itself you significantly reduce the extent to which a pure life gain card is dead
It is also useful in-game, with its attack Brave Slash dealing a whopping 240 damage
Pair those with cost reducers like The Wind Crystal and Pearl Medallion, and you're building toward a hand advantage engine that white decks don't usually get to enjoy.Cards from other Universes Beyond sets fit cleanly too
For another three, it gains a total of 4 power, 5 toughness as a Kithkin Soldier