Elemental Mastery + Galvanic Juggernaut + Phyrexian Altar

Elemental Mastery

Galvanic Juggernaut

Phyrexian Altar

How it works

1. Activate Galvanic Juggernaut by tapping it, creating five 1/1 Elemental creature tokens with haste.
2. Activate Phyrexian Altar by sacrificing an Elemental, adding one mana of any color.
3. The Elemental dies, triggering Galvanic Juggernaut, untapping Galvanic Juggernaut.
4. Repeat.

This clever loop turns Galvanic Juggernaut into a massive token factory by enchanting it with Elemental Mastery, allowing it to tap and flood the board with haste-granting Elementals equal to its power. Because Galvanic Juggernaut naturally refuses to untap during your untap step, it relies entirely on its own trigger—firing whenever *another* creature dies—to stand back up and repeat the process. By funneling those freshly minted tokens straight into Phyrexian Altar, you sacrifice them for mana while simultaneously feeding the exact graveyard triggers Galvanic Juggernaut needs to untap and keep the engine roaring indefinitely.