Sarkhan of the Pale Flame

Haste, Delve.
When Sarkhan of the Pale Flame enters the battlefield, destroy target creature with converted mana cost equal to the number of cards exiled to cast this spell.
All Archspells you cast cost {2} less to cast for each card exiled to cast Sarkhan of the Pale Flame.
Nicknamed the "Relentless Hunter."