Grumgully, the Generous, Protean Hulk, Lesser Masticore, Reckless Fireweaver, and Arcbound Ravager

Prerequisites

• Grumgully, the Generous on the battlefield
• Protean Hulk on the battlefield
• Lesser Masticore in the library
• Reckless Fireweaver in the library
• Arcbound Ravager in the library
• You have a way to kill Protean Hulk available

Steps

1. Cause Protean Hulk to die
2. Protean Hulk triggers, searching your library for Lesser Masticore, Reckles Fireweaver, and Arcbound Ravager, and then putting them onto the battlefield
3. Activate Arcbound Ravager by sacrificing Lesser Masticore
4. Lesser Masticore triggers, returning itself to the battlefield
5. Reckless Fireweaver triggers, dealing 1 damage to each opponent
6. Resolve the Arcbound Ravager ability, putting a +1/+1 counter on it
7. Repeat from step 3

Results

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