Diavolo, The Boss

Indestructible, ward 4, haste
Whenever Diavolo attacks, defending player
reveals their hand to you, then you pick a card
from their hand and have them exile it. You may
cast spells exiled this way without paying their
mana cost as long as they remain exiled.
"In order to grow, we must defeat the mistakes of
our past. The past... even when you break it to pieces
and entomb it in stone, it crawls out like a worm."