Nero, Awoken from the ice

+3: make a copy of an artifact that would produce mana and add Hexproof
-2: Destroy target creature, artifact, or enchantment even if it has Hexproof or indestructible
-20: turn all opponent's artifacts, creatures, and enchantments into 0/0 icicle tokens that can't be put into the graveyard, exile, or the