Metamorphosis Fanatic, Yannik, Scavenging Sentinel, and Yahenni, Undying Partisan

Prerequisites

• Metamorphosis Fanatic in hand
• Yannik, Scavenging Sentinel in the graveyard
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Cast Metamorphosis Fanatic by paying
2. When Metamorphosis Fanatic enters, it triggers, returning Yannik from your graveyard to the battlefield
3. When Yannik enters, it triggers, exiling Metamorphosis Fanatic until Yannik leaves the battlefield and distributing four +1/+1 counters among any number of creatures
4. Activate Yahenni by sacrificing Yannik
5. When Yannik leaves the battlefield, Metamorphosis Fanatic is returned from exile to the battlefield
6. Repeat from step 2
7. Resolve all Yahenni abilities

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters