Ghired, Mirror of the Wilds + Galvanic Juggernaut + Yahenni, Undying Partisan

Ghired, Mirror of the Wilds

Galvanic Juggernaut

Yahenni, Undying Partisan

How it works

1. Create a creature token.
2. Activate Galvanic Juggernaut by tapping it, creating a copy of the creature token.
3. Activate Yahenni by sacrificing a creature token.
4. When the creature token dies, Galvanic Juggernaut triggers, untapping itself.
5. Resolve the Yahenni ability.
6. Repeat from step 2.

This loop transforms the natural synergy of death and replication into an infinite engine, fueled entirely by the overlapping mechanics of your board. Ghired, Mirror of the Wilds grants your nontoken creatures an active ability to copy any token that entered the battlefield this turn, turning Galvanic Juggernaut into a dedicated token-duplication machine while simultaneously benefiting from its haste. Whenever Yahenni, Undying Partisan sacrifices one of those newly minted creature tokens, Galvanic Juggernaut's static trigger notices the death and immediately untaps the Juggernaut so it can tap again for another copy. Yahenni's sacrifice outlet not only keeps the loop cycling infinitely for endless sacrifices, leaves-the-battlefield triggers, and enters-the-battlefield effects, but also conveniently pumps Yahenni with +1/+1 counters and provides a way to protect it with indestructible.