By default, Damn is actually spot removal that hits any creature for a low cost, but it can be overloaded, originally a blue/red Izzet effect, to destroy all creatures instead
Unless youre heart is set on this, its going to be difficult to recur your value
They also have, Whenever you cast a spell with X in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it. That means that youll be generating an extra Hydra for nearly every Hydra you cast
This deal is absolutely incredible for any Commander precon except Revival Trance, but since Final Fantasy Play Boosters are worth about $8 each, youre even getting ahead with the worst deck of the bunch
Mana Confluence and Underworld Connections more aggressively, and play Thoughtseize later in the game with less pressure
This is a fine protection piece, though it can never be your only protection piece due to its cost and the narrow range of protection it offers