Nightmare King Grimm

Haste, Flying, First Strike
Whenever Nightmare King Grimm deals damage, each opponent loses that much life and you gain that much life and put that many flare counters onto Grimm. When Nightmare King Grimm dies, all players gain life equal to the amount of flare counters on Grimm, then create a 4/4 Grimmchild token creature with flying and afflict 3.