Boonweaver Giant, Fungal Fortitude, and Phantom Train

Prerequisites

• Boonweaver Giant on the battlefield
• Fungal Fortitude on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing Boonweaver Giant When Boonweaver Giant dies, Fungal Fortitude triggers, returning Boonweaver Giant from your graveyard to the battlefield When Boonweaver Giant enters, it triggers, returning Fungal Fortitude from your graveyard to the battlefield attached to Boonweaver Giant
2. Resolve the Phantom Train ability from step 1
3. Repeat

Results

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