Together Forever + Ashnod's Altar + Marketback Walker + Cloud Key

Together Forever

Ashnod's Altar

Marketback Walker

Cloud Key

How it works

1. Cast Marketback 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 Marketback Walker.
3. Activate Ashnod's Altar by sacrificing Marketback Walker, adding CC.
4. When Marketback Walker dies, it and Together Forever trigger.
5. Resolve the Marketback Walker trigger, causing you to draw a card.
6. Resolve the Together Forever trigger, returning Marketback Walker from your graveyard to your hand.
7. Repeat.

This clever loop turns Marketback Walker into a self-sustaining engine by exploiting its unique death trigger and low initial cost. With Cloud Key naming artifacts to discount Marketback Walker down to just a single mana, you can recast it easily using the mana generated by sacrificing it to Ashnod's Altar. Meanwhile, Together Forever acts as your insurance policy, letting you pay a single mana to return the Walker to your hand whenever it hits the graveyard. Because Marketback Walker enters with counters that scale its reward, you draw a card on every iteration while endlessly churning through your deck for a win condition.