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Encroaching Mycosynth

Artifact

Nonland permanents you control are artifacts in addition to their other types. The same is true for permanent spells you control and nonland permanent cards you own that aren't on the battlefield.

CMC
4
Mana cost
{3}{U}
Color identity
U
Rarity
rare
Set
Phyrexia: All Will Be One Promos
Price
$0.93
EDHREC rank
#3829
Buy on TCGplayer
Encroaching Mycosynth card art
Encroaching Mycosynth turns every non-artifact permanent you control into an artifact, and that single line of text breaks open entire combo ecosystems at four mana. Commanders like Arcum Dagsson can now tutor for any creature on the board, and Urza, Prince of Kroog makes your whole table cheaper — this is a build-around that earns its slot the moment it resolves.

Best Commanders

Commanders with the highest synergy

01
Arcum Dagsson

Arcum Dagsson

42.6% of decks · synergy 0.39

Arcum Dagsson's activated ability only hits artifact creatures, so Encroaching Mycosynth converts every creature on your board into a legal target — suddenly Arcum can sacrifice any creature to tutor any artifact out of your library, removing the bottleneck that normally requires dedicated artifact creatures as fodder.

02
Emry, Lurker of the Loch

Emry, Lurker of the Loch

28.1% of decks · synergy 0.24

Emry, Lurker of the Loch already operates in a dense artifact shell, and Encroaching Mycosynth pushes that density to a point where cost-reduction effects and recursive loops become easier to assemble — every enchantment and creature you've played is now fuel for artifact synergies.

03
Jhoira, Ageless Innovator

Jhoira, Ageless Innovator

23.7% of decks · synergy 0.23

Jhoira, Ageless Innovator draws a card whenever you cast a historic spell, and Encroaching Mycosynth makes every spell you cast historic by converting your non-artifact permanents to artifacts — the card-draw trigger fires more consistently, which accelerates the whole engine.

04
Lady Octopus, Inspired Inventor

Lady Octopus, Inspired Inventor

26.1% of decks · synergy 0.22

Lady Octopus, Inspired Inventor cares deeply about artifact count for her connive and copy effects, and Encroaching Mycosynth inflates that count by retroactively converting the rest of your board — more artifacts in play means more triggers and larger payoffs on her abilities.

05
Noctis, Prince of Lucis

Noctis, Prince of Lucis

19.3% of decks · synergy 0.18

Noctis, Prince of Lucis cares about equipment and artifact synergies, and Encroaching Mycosynth broadens the pool of permanents that interact with those effects — with every permanent now classified as an artifact, Noctis's cost reductions and synergy triggers fire far more often than they would in a traditional build.

Format Analysis

Where it lives, where it can’t

FormatVerdict
commander legal
legacy legal
modern legal
pioneer legal
standard not legal
vintage legal
pauper not legal
oathbreaker legal

Encroaching Mycosynth is legal in Commander, Legacy, Modern, Pioneer, Vintage, and Oathbreaker, though it sees virtually no play outside Commander. In competitive non-rotating formats, four mana for a static effect with no immediate board impact is too slow when faster artifact-matters payoffs already exist. Commander is where Encroaching Mycosynth is genuinely dangerous: the combination of a large card pool, slower game pace, and commanders that care about artifact type creates an environment where a global type-changing enchantment can warp an entire game state. Oathbreaker offers a similar sandbox but the smaller deck size and more aggressive pace make the four-mana investment harder to justify unless the planeswalker and signature spell specifically break parity.

Key Combos

Combo lines featuring this card

Price Context

Current price

$0.93 bulk tier

At $0.93, Encroaching Mycosynth sits in bulk territory despite being a meaningful engine piece in multiple competitive Commander archetypes. The price reflects its narrow application — it's powerful in the right shell and nearly unplayable outside it — so if you're building Arcum Dagsson or any heavy artifact commander, picking up a copy now is a low-risk inclusion.

Explore

Sources

Mentioned

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Updated . Data from Scryfall, EDHREC, and Commander Spellbook.