Amoeboid Changeling + Intruder Alarm + Otherworldly Escort + Yahenni, Undying Partisan

WUB identity

Commander legal

The 4 combo pieces

• Amoeboid Changeling
• Intruder Alarm
• Otherworldly Escort
• Yahenni, Undying Partisan

How to execute it

1. Activate Amoeboid Changeling's second ability by tapping it, causing Otherworldly Escort to lose all creature types until end of turn.
2. Activate Yahenni by sacrificing Otherworldly Escort.
3. When Otherworldly Escort dies, it triggers, returning itself from your graveyard to the battlefield as a Spirit Detective.
4. When Otherworldly Escort enters, Intruder Alarm triggers, untapping all creatures.
5. Resolve the Yahenni ability.
6. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures