Ashnod's Altar + Good-Fortune Unicorn

生み出すもの: Infinite ETB, Infinite LTB, Infinite colorless mana, Infinite death triggers, Infinite sacrifice triggers

手順

Activate Ashnod's Altar by sacrificing the persist creature.
When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When the persist creature enters, Good-Fortune Unicorn triggers, putting a +1/+1 counter on the persist creature.
Repeat