Phantom Train + Xathrid Necromancer + Xenograft

UB identity

Commander legal

The 3 combo pieces

• Phantom Train
• Xathrid Necromancer
• Xenograft

How to execute it

1. Activate Phantom Train by sacrificing any other creature.
2. When the creature dies as a Human due to Xenograft, Xathrid Necromancer triggers, creating a 2/2 Zombie creature token.
3. Resolve the Phantom Train ability.
4. Repeat.

What the combo produces

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