Amoeboid Changeling + Otherworldly Escort + Phantom Train + Thornbite Staff

WUB identity

Commander legal

The 4 combo pieces

• Amoeboid Changeling
• Otherworldly Escort
• Phantom Train
• Thornbite Staff

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 Phantom Train by sacrificing Otherworldly Escort.
3. When Otherworldly Escort dies, it and Amoeboid Changeling trigger.
4. Resolve the Amoeboid Changeling trigger, untapping it.
5. Resolve the Otherworldly Escort trigger, returning itself from your graveyard to the battlefield as a Spirit Detective.
6. Resolve the Phantom Train ability.
7. Repeat.

What the combo produces

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