Stalwart Successor, Furystoke Giant, and Phantom Train

Prerequisites

• Stalwart Successor on the battlefield
• Furystoke Giant on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing Furystoke Giant When Furystoke Giant dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
2. When Furystoke Giant enters, Stalwart Successor triggers, putting a +1/+1 counter on Furystoke Giant Resolve the Phantom Train ability
3. Repeat

Results

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