Muldrotha, the Gravetide + Displacer Kitten + Sol Ring + Extruder

4-card combo · BGU

Verdict

Yes — this 4-card loop generates infinite ETB, LTB, and +1/+1 counters by recycling Sol Ring through Muldrotha indefinitely.

Cards required: 4
Cheapest stack total: $33.63
Color identity: BGU
Popularity: 2 decks
Format: Commander

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Extruder consumes Sol Ring as a sacrifice outlet, Muldrotha lets Sol Ring be recast from the graveyard each loop, and Displacer Kitten blinks Muldrotha on each artifact cast to reset the one-per-type-per-turn restriction. The loop runs in any Sultai shell that already wants Muldrotha as the commander — the other three pieces are low-cost artifacts and a single uncommon that slots into the 99 without much strain.

Recipe

How it works

Prerequisites

You have not cast an artifact spell using Muldrotha this turn.

Steps

Activate Sol Ring by tapping it, adding .
Activate Extruder by sacrificing Sol Ring, putting a +1/+1 counter on a creature you control.
Cast Sol Ring from your graveyard by paying .
Displacer Kitten triggers, blinking Muldrotha.
Repeat.

Result

Infinite ETB; Infinite LTB; Infinite storm count; Infinite +1/+1 counters on creatures you control

Variations

Cheaper, tighter, alternate lines

Any 1-mana artifact can replace Sol Ring as the free-cycling piece, as long as Muldrotha's artifact-play restriction resets each blink; Tormod's Crypt costs zero and accelerates the loop by eliminating the 1-mana recast cost entirely. For the kill, pair the infinite counters with a creature that already has a relevant death or ETB trigger, or close with Thassa's Oracle after the infinite storm count fills the yard — Extruder and Displacer Kitten contribute nothing lethal on their own.