Rakdos Joins Up, Starfield of Nyx, and Synth Infiltrator

Prerequisites

• Rakdos Joins Up on the battlefield
• Starfield of Nyx on the battlefield
• Synth Infiltrator on the battlefield

Steps

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

Results

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