Bendis, Goddess of War

First strike, menace
Jackals and Warriors you control cost {2} less to cast as long as you exerted a creature this turn.
Whenever another creature you control dies, you may exile a card from your graveyard. If you do, put X +1/+1 counters on target Jackal or Warrior creature you control, where X is equal to the exiled cards converted mana cost.