Felkin Seva, Insidious Outcast

Eminence — As long as Felkin Seva, Insidious
Outcast is in the command zone or on the battlefield whenever you deal damage to a player (including yourself) you may draw a card or pay {u}{b} to exile a creature card from your hand
When Felkin Seva, Insidious Outcast leaves the battlefield you may cast all cards exiled by him
without paying their mana costs