Elemental Mastery + Galvanic Juggernaut + Spawning Pit

Elemental Mastery

Galvanic Juggernaut

Spawning Pit

How it works

1. Activate Galvanic Juggernaut by tapping it, creating five 1/1 Elemental creature tokens with haste.
2. Activate Spawning Pit's first ability by sacrificing an Elemental.
3. When the Elemental dies, Galvanic Juggernaut triggers, untapping Galvanic Juggernaut.
4. Resolve the Spawning Pit ability, putting a charge counter on it.
5. Repeat.

This clever loop relies on Galvanic Juggernaut’s unique inability to untap naturally during your untap step, turning its death-triggered untap into a reliable engine when enchanted with Elemental Mastery. By tapping the Juggernaut to create a swarm of hasty tokens, you feed those creatures directly into Spawning Pit to fuel its sacrifice ability. Every single sacrifice triggers Galvanic Juggernaut to untap instantly, allowing you to repeat the process to generate infinite death triggers, enter-the-battlefield effects, and hasty tokens while accumulating endless charge counters on the Pit.