Volunox, Cosmic Fatespinner

When you cast this spell, exile the top 5 cards of
each player's library, then you may play a card
from exile without paying it's mana cost.
Vigilance, hexproof
Whenever Volunox attacks or blocks, the
defending or attacking player exiles two
permanents they control, then you may play a
card from exile without paying it's mana cost.