Ratadrabik of Urborg, Boonweaver Giant, In Bolas's Clutches, and Phantom Train

Prerequisites

• Ratadrabik of Urborg on the battlefield
• Boonweaver Giant on the battlefield
• In Bolas's Clutches on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing Boonweaver Giant
2. When Boonweaver Giant dies as a legendary creature due to In Bolas's Clutches, Ratadrabik of Urborg triggers, creating a token copy of Boonweaver Giant that is a 2/2 Zombie in addition to its other types
3. When the Boonweaver Giant token enters the battlefield, it triggers, returning In Bolas's Clutches from your graveyard to the battlefield attached to the token
4. Resolve the Phantom Train ability Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on a creature