Sachura, the World Terror

Eminence — As long as Sachura, the World
Terror is in the command zone or on the battlefield, demon spells you cast cost {1} less to
cast for each creature in your graveyard.
Reach, haste
You may cast demon spells from your graveyard. Whenever you cast a spell, surveil 2. Whenever
a nonland card is removed from the battlefield,
any player may pay X life equal to that card's converted mana cost, and shuffle it back into
it's owners' library.