Grenzo, Dungeon Warden, Threefold Thunderhulk, Krark-Clan Ironworks, and Sundering Archaic

Prerequisites

• Grenzo, Dungeon Warden on the battlefield
• Threefold Thunderhulk in the graveyard
• Krark-Clan Ironworks on the battlefield
• Sundering Archaic on the battlefield
• available

Steps

1. Activate [[Permanent with "Pay Mana: Put target card from your graveyard on the bottom of your library"]] by paying , putting Threefold Thunderhulk on the bottom of your library from your graveyard
2. Activate Grenzo by paying , putting Threefold Thunderhulk into your graveyard from the bottom of your library, and then putting it onto the battlefield
3. When Threefold Thunderhulk enters the battlefield, it triggers, creating three 1/1 Gnome artifact creature tokens
4. Activate Krark-Clan Ironworks four times by sacrificing Threefold Thunderhulk and the Gnomes, adding
5. Repeat

Results

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