Survey Mechan + Mortuary + Ashnod's Altar + Tormod, the Desecrator + Kaya, Geist Hunter

Survey Mechan

Mortuary

Ashnod's Altar

Tormod, the Desecrator

Kaya, Geist Hunter

How it works

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

This clever loop turns Survey Mechan into a self-sustaining engine by letting Mortuary neatly recycle it back to the top of your library every time it bites the dust. Ashnod's Altar provides the mana to recast the bird by sacrificing the Zombie tokens generated by Tormod, the Desecrator when Survey Mechan leaves the graveyard. Meanwhile, Kaya, Geist Hunter supercharges the token production by doubling everything Tormod spits out, ensuring you always generate a net surplus of mana and resources to keep the loop going indefinitely.