Satinir, The Forsaken

Vigilance, protection from white
When Satinir enters the battlefield, destroy all white creatures your opponents control and summon two 3/3 Demon tokens.
Whenever a Demon you control dies, add {b} to your mana pool and gain 2 life.
Corrupt Legacy -- At the start of your untap step, however many Demons you control, deal that much to target creature or player.