Kylith, Lord of Shadowflame

Flying, Deathtouch, Lifelink, Omnipresent
(If this creature were to leave the battlefield
you may pay 5 life, if you do return this
creature to the battlefield.)
Whenever an opponent permanent is
destroyed, target creature under your control
get a +1/+1. This counter is permanent. If a
creature you control dies create X Shadowflame
Embers where X is target creatures
converted mana cost.