Demonic Subjugator

Flying, Trample
Demons you control have haste
At the beginning of your upkeep, you may pay {x}{b/r}{b/r}, if you do, create X 1/1 red demon creature tokens
Sacrifice a demon: Demonic Subjugator deals 1 damage to target creature
Sacrifice X demons: look at the top X cards of your library, then put a card with converted mana cost X or less and put it into your hand