Cayth, Famed Mechanist, Mana Echoes, and Coercive Recruiter

Prerequisites

• Cayth, Famed Mechanist on the battlefield
• Mana Echoes on the battlefield
• Coercive Recruiter on the battlefield
• available

Steps

1. Activate Cayth by paying and tapping it, creating a copy of the Coercive Recruiter token
2. When the Coercive Recruiter token enters the battlefield, it and Mana Echoes trigger
3. Resolve the Coercive Recruiter trigger, untapping Cayth Resolve the Mana Echoes trigger, adding for each creature you control that shares a type with the Coercive Recruiter token
4. Repeat

Results

• Infinite ETB
• Infinite colorless mana
• Infinite creature tokens