Grenzo, Dungeon Warden + Threefold Thunderhulk + Phyrexian Altar + Tomb Trawler

Grenzo, Dungeon Warden

Threefold Thunderhulk

Phyrexian Altar

Tomb Trawler

How it works

1. Activate Tomb Trawler 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.