Stalwart Successor, Ashnod's Altar, and Furystoke Giant

Prerequisites

• Stalwart Successor on the battlefield
• Ashnod's Altar on the battlefield
• Furystoke Giant on the battlefield

Steps

1. Activate Ashnod's Altar 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 Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite creature sacrifice triggers