Cayth, Famed Mechanist, Thornbite Staff, and Krark-Clan Ironworks

Prerequisites

• Cayth, Famed Mechanist on the battlefield
• Thornbite Staff on the battlefield
• Krark-Clan Ironworks on the battlefield
• available

Steps

1. Activate Cayth by paying and tapping it, creating a copy of an artifact creature token you control
2. Activate Krark-Clan Ironworks by sacrificing the creature token, adding
3. When the creature dies, Cayth triggers, untapping Cayth
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers