Mikaeus, the Unhallowed + Canker Abomination

Prerequisites

• An opponent controls seven or more creatures.

Steps

1. 1Cast Canker Abomination by paying .
2. 2When Canker Abomination enters the battlefield, it triggers, putting a number of -1/-1 counters on it equal to the number of creatures an opponent controls.
3. 3Canker Abomination dies as a state-based action due to having 0 or less toughness, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
4. 4Repeat from step 2.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers