Leyline of Singularity + Ratadrabik of Urborg + Reckless Barbarian

WUBR identity

Commander legal

The 3 combo pieces

• Leyline of Singularity
• Ratadrabik of Urborg
• Reckless Barbarian

How to execute it

1. Activate Reckless Barbarian by sacrificing it.
2. When Reckless Barbarian dies, Ratadrabik triggers, creating a token copy of Reckless Barbarian that is a 2/2 legendary Zombie in addition to its other types.
3. Repeat using the Reckless Barbarian token

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite red mana
• Infinite sacrifice triggers