Together Forever + Ashnod's Altar + Hangarback Walker + Starnheim Courser

Together Forever

Ashnod's Altar

Hangarback Walker

Starnheim Courser

How it works

1. Cast Hangarback Walker by paying 1, causing it to enter the battlefield with a +1/+1 counter on it.
2. Activate Together Forever by paying 1, targeting Hangarback Walker.
3. Activate Ashnod's Altar by sacrificing Hangarback Walker, adding CC.
4. When Hangarback Walker dies, Together Forever triggers, returning Hangarback Walker from your graveyard to your hand.
5. Repeat.

This loop turns Hangarback Walker into an endlessly recurring engine for colorless mana, tokens, and death triggers by constantly bouncing it back to your hand instead of letting it stay in the graveyard. Ashnod's Altar fuels the cycle by providing the necessary sacrifice outlet and generating more than enough mana to pay for Together Forever's activation and the subsequent recasting of the Walker. Meanwhile, Starnheim Courser plays a crucial passive role by reducing the artifact casting cost, making the entire loop self-sustaining and capable of flooding the board with infinite Thopters while generating infinite colorless mana.