Pleasingly, firebending neatly mirrors the mechanic colloquially known as firebreathing which gets a nod on one of the sets dragon cards
However, While Wulfgar costs five mana and only doubles triggers based on its controller's creatures attacking, Isshin costs two less mana whilst also doubling triggers that may care about an opponent's creatures attacking, making Isshin simultaneously more flexible and more efficient of an option
Its Heavy Splash attack is pretty expensive, costing 4 Energy total (2 Water, 2 Colorless), and hits for 120 damage, which is ok
Every upkeep you can choose to put a charge counter on it, then tap it to put a creature into play with a converted mana cost equal to the number of charge counters
When the art of the set emphasizes a realistic look, some artists will even go as far as creating plastic figures of Pokmon to photograph for certain cards