Emry, Lurker of the Loch + Mirran Spy + Thermal Navigator + Sol Ring

4-card combo · U

Verdict

Yes — this 4-card loop generates infinite colorless mana and infinite storm count in any blue artifact shell that can assemble the pieces.

Cards required: 4
Cheapest stack total: $292.62
Color identity: U
Popularity: 114 decks
Format: Commander

Buy required cards on TCGplayer

Emry, Lurker of the Loch recasts Sol Ring from the graveyard; Thermal Navigator consumes it to reset the graveyard target; Mirran Spy untaps Emry each time an artifact is cast, closing the loop. Every iteration nets one colorless mana before Sol Ring's cost, so the loop goes infinite with no ceiling on death or ETB triggers.

Recipe

How it works

Prerequisites

Emry does not have summoning sickness.

Steps

Activate Sol Ring by tapping it, adding .
Activate Thermal Navigator by sacrificing Sol Ring, giving Thermal Navigator flying until end of turn.
Activate Emry by tapping it, allowing yourself to cast Sol Ring from your graveyard this turn.
Cast Sol Ring from your graveyard by paying .
When you cast Sol Ring, Mirran Spy triggers, untapping Emry.
Sol Ring resolves.
Repeat any number of times.
Once you have infinite colorless mana, you may repeat the loop targeting any castable artifact card in your graveyard in step 3 each time.
You may also skip step 2 to leave your artifacts on the battlefield, or you may sacrifice Thermal Navigator in step 2 and recast it in step 4 for infinite ETB, LTB, sacrifice, and death triggers.

Result

Cast all colorless artifacts from your graveyard any number of times; Infinite colorless mana; Infinite death triggers; Infinite ETB; Infinite LTB; Infinite sacrifice triggers; Infinite storm count

Variations

Cheaper, tighter, alternate lines

Thermal Navigator is the narrowest piece — its sacrifice activation is the only reason Sol Ring cycles back to the graveyard each loop, and it has no direct substitute in the same role. If the Navigator is removed, Mirran Spy still untaps Emry freely whenever any other artifact is cast, so the shell can pivot to Grinding Station or Altar of the Brood as a drain win rather than rebuilding the loop from scratch.