Sabetha Belacoros

Shadow (This creature can block or be blocked by only creatures with shadow.)
Whenever Sabetha Belacoros deals combat damage to a player, that player exiles the top
card of their library face down and you lose
1 life. You may look at and cast cards exiled with Sabetha Belacoros until she leaves the battlefield, and you may spend mana as though
it were mana of any type to cast these spells.