Antler Skulkin, Krark-Clan Ironworks, and Arcbound Prototype

Prerequisites

• Antler Skulkin on the battlefield
• Krark-Clan Ironworks on the battlefield
• Arcbound Prototype on the battlefield
• available

Steps

1. Activate Antler Skulkin by paying , giving Arcbound Prototype persist until end of turn
2. Activate Krark-Clan Ironworks by sacrificing Arcbound Prototype, adding
3. When Arcbound Prototype dies, its modular and persist abilities trigger
4. Resolve the modular trigger, putting all +1/+1 counters on Arcbound Prototype onto another artifact creature you control
5. Resolve the persist trigger, returning Arcbound Prototype from your graveyard to the battlefield with one +1/+1 counter on it due to its modular ability
6. Repeat

Results

• Infinite +1/+1 counters on each artifact creature you control except Arcbound Prototype
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers