Phantom Train + Skittering Precursor + Sword of the Meek + Weapons Trainer

RWB identity

Commander legal

The 4 combo pieces

• Phantom Train
• Skittering Precursor
• Sword of the Meek
• Weapons Trainer

How to execute it

1. Activate Phantom Train by sacrificing Sword of the Meek.
2. Skittering Precursor triggers, creating a 0/1 Eldrazi Spawn creature token.
3. When the Eldrazi Spawn enters the battlefield as a 1/1 due to Weapons Trainer, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn.
4. Resolve the Phantom Train ability
5. Repeat.

What the combo produces

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