Activate Transplant Theorist by paying 2, putting Orcish Bowmasters on the bottom of your library from your graveyard.
Activate Grenzo by paying 2, putting Orcish Bowmasters into your graveyard from the bottom of your library, and then putting it onto the battlefield.
When Orcish Bowmasters enters the battlefield, it triggers, dealing 1 damage to any target, then creating a 0/0 Orc Army creature token and putting a +1/+1 counter on it.
Activate Ashnod's Altar twice by sacrificing the Army and Orcish Bowmasters, adding CCCC.
Repeat.
This clever loop relies on Grenzo, Dungeon Warden to constantly dredge creatures from the bottom of your library back onto the battlefield, utilizing the mana generated by Ashnod's Altar to keep the engine running. Every time Orcish Bowmasters enters the battlefield, it deals damage and amasses an Orc token, giving you fresh sacrifices for Ashnod's Altar while threatening the table with infinite damage. Meanwhile, Transplant Theorist plays a crucial structural role by using its activated ability to recycle Orcish Bowmasters from the graveyard back to the bottom of your library, while its passive triggered ability lets you filter your hand along the way.