Grenzo, Dungeon Warden + Threefold Thunderhulk + Transplant Theorist + Phyrexian Altar

Grenzo, Dungeon Warden

Threefold Thunderhulk

Transplant Theorist

Phyrexian Altar

How it works

1. Activate Transplant Theorist 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 Phyrexian Altar four times by sacrificing Threefold Thunderhulk and the Gnomes, adding 4.
5. Repeat.