Goblin Welder + Corridor Monitor + Esper Sojourners

Goblin Welder

Corridor Monitor

Esper Sojourners

How it works

1. Activate Goblin Welder by tapping it, sacrificing Esper Sojourners and returning Corridor Monitor from your graveyard to the battlefield.
2. Esper Sojourners and Corridor Monitor trigger.
3. Resolve the Esper Sojourners trigger, untapping Goblin Welder.
4. Holding priority, activate Goblin Welder by tapping it, sacrificing Corridor Monitor and returning Esper Sojourners from your graveyard to the battlefield.
5. Resolve the Corridor Monitor trigger from step 2, untapping Goblin Welder.
6. Repeat.

This clever loop turns our favorite goblin artificer into an eternal swap shop, using Corridor Monitor and Esper Sojourners to endlessly trade places between the battlefield and the graveyard. As Goblin Welder swaps the two creatures back and forth, Corridor Monitor's entry trigger untaps the welder to keep the engine running, while Esper Sojourners's death trigger provides a redundant safety valve that can also untap the welder if needed. By constantly recycling these two specific artifacts through the graveyard, you generate an infinite stream of sacrifice, entry, and death triggers to fuel whatever win condition you have waiting in the wings.