The Master, Formed Anew + Carrion Feeder + Persist Creature + Undying Creature

Prerequisites

• The Master on the battlefield as a copy of either the persist or undying creature.
• The Master does not have a +1/+1 counter on it if it is a copy of the undying creature, or a -1/-1 counter on it otherwise.
• Persist Creature; Undying Creature

Steps

1. 1Activate Carrion Feeder by sacrificing The Master.
2. 2When The Master dies, if it was a copy of the undying creature, its undying ability triggers, returning it from your graveyard to the battlefield as a copy of the persist creature with a +1/+1 counter on it.
3. 3Otherwise, if The Master was a copy of the persist creature, its persist ability triggers, returning it from your graveyard to the battlefield as a copy of the undying creature with a -1/-1 counter on it.
4. 4Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
5. 5Repeat.

Effects

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers