Survey Mechan + Mortuary + Ashnod's Altar + Desecrated Tomb + Adrix and Nev, Twincasters

Survey Mechan

Mortuary

Ashnod's Altar

Desecrated Tomb

Adrix and Nev, Twincasters

How it works

1. Activate Survey Mechan by sacrificing it.
2. When Survey Mechan dies, Mortuary triggers, putting Survey Mechan from your graveyard onto the top of your library.
3. Desecrated Tomb triggers, creating two creature tokens.
4. Resolve the Survey Mechan ability, dealing 3 damage to any target and causing you to draw three cards and gain 3 life.
5. Activate Ashnod's Altar twice by sacrificing the two creature tokens, adding CCCC.
6. Cast Survey Mechan by paying 4.
7. Repeat.

This clever loop centers around Survey Mechan, whose sacrifice ability would normally be prohibitively expensive, but here we can repeatedly recycle it using Mortuary to place it right back on top of our library. Whenever Survey Mechan leaves the graveyard to be cast again, Desecrated Tomb triggers to spawn a Bat token, a process dynamically doubled by Adrix and Nev, Twincasters into a pair of tokens instead of just one. Those tokens are then fed directly into Ashnod's Altar to generate the mana needed to recast Survey Mechan from the top of your library, fueling an endless cycle of damage, card draw, and life gain.