Marwyn, the Nurturer + Eternal Witness + Temur Sabertooth + Emerald Charm
4-card combo · G
Verdict
Yes — this 4-card loop generates infinite green mana and infinite ETB triggers once Marwyn hits 7 power.
- Cards required
- 4
- Cheapest stack total
- $8.09
- Color identity
- G
- Popularity
- 340 decks
- Format
- Commander
Marwyn, the Nurturer taps for at least seven green; Emerald Charm untaps her for one, Temur Sabertooth bounces Eternal Witness for three, and Eternal Witness replays Emerald Charm on entry for three more — net positive each cycle. The whole engine lives in mono-green Elf or counters shells that already want Marwyn large, meaning Elvish Archdruid, Selvala, Heart of the Wilds, and similar power-boosters do double duty building toward the threshold.
Recipe
How it works
01
Prerequisites
Marwyn does not have summoning sickness. Marwyn has a power of at least seven.
02
Steps
- Activate Marwyn by tapping it, adding at least seven
.
- Cast Emerald Charm by paying
, untapping Marwyn.
- Activate Temur Sabertooth by paying
, returning Eternal Witness from the battlefield to your hand.
- Cast Eternal Witness by paying
.
- Eternal Witness enters the battlefield, returning Emerald Charm from your graveyard to your hand.
- Repeat.
03
Result
Infinite blinking of some creatures; Infinite ETB; Infinite green mana; Infinite LTB; Infinite magecraft triggers; Infinite mana creatures you control can produce; Infinite storm count; Infinite untap of creatures you control
Variations
Cheaper, tighter, alternate lines
Any untap effect cheaper than one green replaces Emerald Charm — Quirion Ranger and Wirewood Symbiote both fit in Elf builds and cost nothing extra to include. Marwyn reaching 7 power is the real prerequisite hurdle; Elven Chorus or Overwhelming Stampede can push her over the line if the board is stalled. Add Walking Ballista or Finale of Devastation as the closer — the loop makes mana and triggers, not damage.
Verified on Commander Spellbook · Combo ID eternal-witness-marwyn-the-nurturer-temur-sabertooth
Updated . Data from Commander Spellbook, Scryfall, and EDHREC.









