Geralf, the Fleshwright + Phyrexian Altar + Putrid Goblin

UB identity

Commander legal

The 3 combo pieces

What must be in place

Putrid Goblin does not have a -1/-1 counter on it.
You have had at least one Zombie enter the battlefield under your control this turn.

How to execute it

  1. Activate Phyrexian Altar by sacrificing Putrid Goblin, adding one mana of any color.
  2. When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. When Putrid Goblin enters the battlefield, Geralf's second ability triggers, putting a number of +1/+1 counters on it equal to the number of other Zombies that entered the battlefield under your cotnrol this turn.
  4. Repeat.

What the combo produces