Elder Brain

Menace
Whenever Elder Brain attacks a player, exile all
cards from that player's hand, then they draw
that many cards. You may play lands and cast
spells from among the exiled cards for as long as
they remain exiled. If you cast a spell this way,
you may spend mana as though it were mana of
any color to cast it.
"I don't know what to be...tell me what to be."
-MODOK