Counter target spell.
If you control a commander, you may cast this spell without paying its mana cost. Counter target noncreature spell.
Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.
Flying You can't lose the game and your opponents can't win the game.
Sea of Clouds enters tapped unless you have two or more opponents. {T}: Add {W} or {U}.
Exile target creature. Its controller gains life equal to its power.
Whenever a creature you control enters, you may destroy target artifact or enchantment.
Flying, vigilance, indestructible Other permanents you control have indestructible.