Finally, Felidar Sovereign presents a must kill threat, lest you win the game on the following turn
If you Summon from your Deck this way, you cannot Special Summon for the rest of this turn, except monsters with that same original Type
The festival-themed set is notable for introducing Stadium cards that can remain in effect only until another Stadium card replaces them
Liliana, Dreadhorde General Welcome to Four Ability Lili
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)
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