x cards mtg Question about (X) mana values. During FNM, one of my opponents was casting a card with an (X) in its mana value while he has around 12 +1/+1 counters on Animar. The Whenever another Mutant you control enters The Best X-Cost Spells In

Either way, having 20 creatures in play to win is definitely possible, but you should be winning from there with a simple mass-pump effect like Overrun as well

The stipulation being if you deck qualifies

Ideally, you should have something that covers one-shot artifact hate (Relic of Progenitus, Tormods Crypt, etc.), the interaction thats hidden in the opponents hand (Endurance, countermagic, etc.), other problematic permanents (Dauthi Voidwalker, Sanctifier en -Vec), and sometimes enchantment with static abilities (Leyline of the Void or Rest in Peace)

Similar to flying, horsemanship is an evasion ability but with a huge difference