Grenzo, Dungeon Warden + Threefold Thunderhulk + Krark-Clan Ironworks + Barkform Harvester

Grenzo, Dungeon Warden

Threefold Thunderhulk

Krark-Clan Ironworks

Barkform Harvester

How it works

1. Activate Barkform Harvester 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 three times by sacrificing Threefold Thunderhulk and two Gnomes, adding six C.
5. Repeat.