Rakdos Joins Up + Opalescence + Hulking Metamorph

Rakdos Joins Up

Opalescence

Hulking Metamorph

How it works

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

This loop hinges on a clever interaction where Hulking Metamorph enters as a copy of Rakdos Joins Up, immediately falling victim to the legend rule and hitting the graveyard. Thanks to Opalescence turning enchantments into creatures, Hulking Metamorph counts as a creature dying, which triggers both copies of Rakdos Joins Up to deal damage based on their power. Simultaneously, the newly milled Hulking Metamorph triggers its own reanimation ability to return itself straight back to the battlefield with two additional +1/+1 counters. Because it enters as another copy of Rakdos Joins Up, the cycle repeats endlessly, letting you blast your opponents with infinite damage.