Muldrotha, the Gravetide + Eternal Witness + Ashnod's Altar + Time Warp

4-card combo · BGU

Verdict

Yes — this 4-card loop locks the table under infinite turns as long as Muldrotha, the Gravetide survives.

Cards required: 4
Cheapest stack total: $23.15
Color identity: BGU
Popularity: 73 decks
Format: Commander

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Muldrotha, the Gravetide lets Eternal Witness be cast from the graveyard each turn; Eternal Witness returns Time Warp to hand, Ashnod's Altar cashes in the Witness for two colorless, and Time Warp costs exactly that plus three blue to loop. The whole engine runs on one creature cast per turn cycle — Muldrotha's built-in restriction — so the combo is self-contained under any Sultai self-mill or graveyard-value shell.

Recipe

How it works

Prerequisites

You have not cast a creature spell using Muldrotha this turn.

Steps

Cast Eternal Witness from your graveyard by paying .
Eternal Witness enters the battlefield, returning Time Warp from your graveyard to your hand.
Activate Ashnod's Altar by sacrificing Eternal Witness, adding .
Cast Time Warp by paying , causing you to take an extra turn after this one.
Repeat each turn.

Result

Infinite turns; Lock

Variations

Cheaper, tighter, alternate lines

Temur Sabertooth replaces Ashnod's Altar if sacrificing creatures is painful — bounce Eternal Witness, recast it next turn, repeat — but it costs more mana per loop and requires Muldrotha to stay in play all the same. Regrowth or Noxious Revival can proxy Time Warp back once, but neither loops without Eternal Witness specifically; the combo's weakest link is protecting Muldrotha, the Gravetide through each extra turn.