Enn the Voidsmith

You may play cards you don't own from exile. You may spend mana as if it were any color to cast those spells. If you cast an instant or sorcery this way, put it on the bottom of its owner's library.
Whenever an opponent casts a spell, if it isn't their turn, that player exiles the top card of their library face up.
"I can get something from nothingness."