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

Grenzo, Dungeon Warden

Threefold Thunderhulk

Krark-Clan Ironworks

Sundering Archaic

How it works

1. Activate [[Permanent with "Pay Mana: Put target card from your graveyard on the bottom of your library"]] by paying 2, putting Threefold Thunderhulk on the bottom of your library from your graveyard.
2. Activate Grenzo by paying 2, 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 4.
5. Repeat.