Scrap Trawler + Myr Retriever + Krark-Clan Ironworks + Urza, Lord Protector

Prerequisites

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Steps

1. 1Activate Krark-Clan Ironworks by sacrificing Myr Retriever, adding .
2. 2When Myr Retriever dies, it triggers, returning Scrap Trawler from your graveyard to your hand.
3. 3Cast Scrap Trawler by paying its mana cost, which is reduced by Urza.
4. 4Activate Krark-Clan Ironworks by sacrificing Scrap Trawler, adding .
5. 5When Scrap Trawler dies, it triggers, returning Myr Retriever from your graveyard to your hand.
6. 6Cast Myr Retriever by paying its mana cost, which is reduced by Urza.
7. 7Repeat.

Effects

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count