Together Forever + Ashnod's Altar + Walking Ballista + Urza's Incubator

Together Forever

Ashnod's Altar

Walking Ballista

Urza's Incubator

How it works

1. Cast Walking Ballista by paying 0 due to Urza's Incubator, causing it to enter the battlefield with a +1/+1 counter on it.
2. Activate Together Forever by paying 1, targeting Walking Ballista.
3. Activate Ashnod's Altar by sacrificing Walking Ballista, adding CC.
4. When Walking Ballista dies, Together Forever triggers, returning Walking Ballista from your graveyard to your hand.
5. Repeat.

This clever loop relies on Urza's Incubator naming Construct to slash Walking Ballista's cost down to zero, letting the automaton enter the battlefield with its native +1/+1 counter ready for action. Once it hits play, Together Forever steps in with its activated ability to place a safety net under Walking Ballista for just one mana. You then feed Walking Ballista to Ashnod's Altar, generating two colorless mana while triggering Together Forever to bounce the dying construct straight back to your hand. Because Urza's Incubator makes recasting it completely free, you can loop this process infinitely to farm endless mana, sacrifice triggers, and damage for the win.