Together Forever + Ashnod's Altar + Hangarback Walker + Herald of Kozilek

Together Forever

Ashnod's Altar

Hangarback Walker

Herald of Kozilek

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 clever loop turns Hangarback Walker into a self-sustaining engine by exploiting the cost-reduction of Herald of Kozilek alongside a clever recursion trick. When you pay just {1} to recast Hangarback Walker thanks to the Herald's passive discount, Together Forever is ready to protect it for another tiny investment of {1}. Sacrificing the Walker to Ashnod's Altar generates {C}{C}—more than enough mana to fund both the activation and the recast while leaving a steady stream of colorless mana and Thopter tokens in your wake.