Goblin Welder + Unbender Tine + Dross Scorpion + Liquimetal Torque

Goblin Welder

Unbender Tine

Dross Scorpion

Liquimetal Torque

How it works

1. Activate Liquimetal Torque's second ability by tapping it, causing Goblin Welder to become an artifact in addition to its other types until end of turn.
2. Activate Goblin Welder by tapping it, sacrificing Dross Scorpion and returning Unbender Tine from your graveyard to the battlefield.
3. Dross Scorpion triggers, untapping Goblin Welder.
4. Activate Unbender Tine by tapping it, targeting Goblin Welder.
5. Holding priority, activate Goblin Welder by tapping it, sacrificing Unbender Tine and returning Dross Scorpion from your graveyard to the battlefield.
6. Resolve the Unbender Tine ability, untapping Goblin Welder.
7. Repeat from step 2.

This clever loop relies on a clever transformation made permanent-fluid by Liquimetal Torque, which turns Goblin Welder into an artifact so it can sacrifice itself and be brought right back. As you execute this dance, Dross Scorpion provides the crucial death-trigger engine to untap the Welder each time an artifact creature bites the dust. Meanwhile, Unbender Tine serves as the other half of the swap material while its own untap ability helps keep the tempo going, ensuring you can endlessly recur your pieces. Through this cyclical exchange of metal and machinery, you effortlessly generate infinite creature entries, exits, deaths, and sacrifices.