Opalescence + Phyrexian Metamorph + Rakdos Joins Up

WUBR identity

Commander legal

The 3 combo pieces

• Opalescence
• Phyrexian Metamorph
• Rakdos Joins Up

How to execute it

1. Cast Phyrexian Metamorph by paying its mana cost. Choose to have it enter the battlefield as a copy of Rakdos Joins Up.
2. Put Phyrexian Metamorph into your graveyard due to the legend rule.
3. Phyrexian Metamorph's first ability and second ability trigger, along with Rakdos Joins Up's second ability.
4. Resolve Phyrexian Metamorph's second trigger and Rakdos Joins Up's trigger, dealing damage to target opponent.
5. Resolve Phyrexian Metamorph's first trigger, returning it from your graveyard to the battlefield with two +1/+1 counters on it as a copy of Rakdos Joins Up.
6. Repeat from step 2.

What the combo produces

• Infinite creature LTB
• Infinite damage
• Infinite death triggers
• Infinite ETB