Grimgrin, Corpse-Born + Havengul Lich + Relic of Legends + Rooftop Storm

UB identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Relic of Legends' second ability by tapping Grimgrin, adding {1}.
  2. Activate Havengul Lich by paying {1}, allowing you to cast the Zombie card from your graveyard this turn.
  3. Cast the Zombie from your graveyard by paying {0} due to Rooftop Storm.
  4. Activate Grimgrin by sacrificing the Zombie, untapping Grimgrin and putting a +1/+1 counter on it.
  5. Repeat.

What the combo produces