Ungraded & graded values for all Pokemon MC24 Pokemon Cards
If you cast Slaying Fire without paying its mana cost somehow, you probably didn't spend at least three red mana to cast it, so the adamant bonus won't apply
Gardevoir has one main weakness of its own, however, and thats the fact that it is a Stage 2 Pokemon: if you cannot get a Raltz and a Krilia, as well as a Gardevoir, early in the match, Mewtwo EXs big problems will begin to bleed through and open an opportunity for your opponents to punish
3 damage for 1 mana is a great deal, and its seen as one of the most powerful removal cards in the game
Making matters worse, to support backup commander Zaxara, the Exemplary, the deck also has some random X-spells that are not especially playable as well as creatures like Hungering Hydra and Vastwood Hydra, which don't do much to support the primary mutate theme (other than possibly add a creature with some +1/+1 counters to the battlefield to mutate on)