phyrexian mtg commander deck EDH | Tribal | Atraxa, Praetors' Voice The Gathering MTG Commander Phyrexian Deckbox w/

Take a look (or wait for your copy to arrive

Ravenous Squirrel has a similar ability to your commander that lets it grow as you sacrifice artifacts and creatures, and it has a sac outlet that gives you 1 life plus a card

Needing five of them to activate the ability is a lot, more than Persistent Petitioners, but less than Shadowborn Apostles

The deck is reliant on specific cards so I'm running a much higher than average amount of tutors: Trinket Mage to find our busted mana rocks, Tribute Mage to find Throne of Geth simply the best card in the 99, Solve the Equation and Mystical Teachings to find our poison cards, and Ringsight to find any black/blue card with Venser out, plus gives him skulk to get around blockers