Captain Storm, Cosmium Raider + Lesser Masticore + Leyline of Transformation + Phantom Train

UBR identity

Commander legal

The 4 combo pieces

• Captain Storm, Cosmium Raider
• Lesser Masticore
• Leyline of Transformation
• Phantom Train

How to execute it

1. Activate Phantom Train by sacrificing Lesser Masticore.
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Lesser Masticore enters the battlefield, Captain Storm triggers, putting a +1/+1 counter on Lesser Masticore.
4. Resolve the Phantom Train ability.
5. Repeat.

What the combo produces

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