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Thassa, Deep-Dwelling

Legendary Enchantment Creature — God

Indestructible
As long as your devotion to blue is less than five, Thassa isn't a creature.
At the beginning of your end step, exile up to one other target creature you control, then return that card to the battlefield under your control.
{3}{U}: Tap another target creature.

CMC
4
Mana cost
{3}{U}
Color identity
U
Rarity
mythic
Set
Theros Beyond Death
Price
$33.40
EDHREC rank
#1227
Buy on TCGplayer
Thassa, Deep-Dwelling card art
Thassa, Deep-Dwelling blinking a creature at end of every turn — for free, every turn — is one of the most backbreaking slow-roll engines in Commander, and the four-mana entry cost is fully justified by that upside. Anything with an enters-the-battlefield trigger, from Archaeomancer to Y'shtola Rhul, becomes a repeatable value machine the moment Thassa hits the table.

Best Commanders

Commanders with the highest synergy

01
Y'shtola Rhul

Y'shtola Rhul

73.4% of decks · synergy 0.69

Y'shtola Rhul's triggered ability fires on creature ETBs, so Thassa, Deep-Dwelling turning every end step into a free blink means Y'shtola is generating resources on a loop without any additional investment.

02
Gyruda, Doom of Depths

Gyruda, Doom of Depths

55.0% of decks · synergy 0.52

Gyruda, Doom of Depths mills four and cheats in a creature on entry, and Thassa, Deep-Dwelling blinking Gyruda at end of turn restarts that mill-and-steal engine every single turn — the deck frequently assembles an infinite loop from that pairing alone.

03
Niko, Light of Hope

Niko, Light of Hope

47.8% of decks · synergy 0.42

Niko, Light of Hope creates Shard tokens when creatures enter the battlefield, so Thassa, Deep-Dwelling providing a free blink each turn translates directly into a growing Shard stockpile without needing extra spells.

04
Círdan the Shipwright

Círdan the Shipwright

43.8% of decks · synergy 0.41

Círdan the Shipwright draws a card whenever a creature enters under your control, making Thassa, Deep-Dwelling's end-step blink a reliable card-per-turn engine on top of whatever the blinked creature itself does.

05
Cynette, Jelly Drover

Cynette, Jelly Drover

45.1% of decks · synergy 0.41

Cynette, Jelly Drover creates Food tokens off creature ETBs, and Thassa, Deep-Dwelling's automatic blink means Cynette is generating a Food every end step passively, fueling both lifegain and sacrifice synergies throughout the game.

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

Commander is by far the primary home for Thassa, Deep-Dwelling — the singleton format's density of ETB creatures gives Thassa a near-guaranteed engine partner, and the four-mana cost is trivial across a longer game. In Pioneer and Modern she sees fringe play in blink-based midrange shells, mostly as a curve-topper in dedicated ETB decks, but the competition from cheaper blink effects and the lack of a tutor-able combo context limits her ceiling. Legacy and Vintage have access to faster, more broken things, so Thassa, Deep-Dwelling rarely shows up there outside of casual brews. Oathbreaker is a reasonable home if your signature spell triggers on creature ETBs — the math is the same as Commander, just compressed.

Key Combos

Combo lines featuring this card

Budget Alternatives

Cheaper options that do most of the same work

Conjurer's Closet does the same end-step blink for five mana and costs under a dollar, making it the cleanest direct replacement — you lose the indestructibility and the devotion body, but the core function survives. Teleportation Circle is another one-mana cheaper enchantment that blinks at end of turn and runs well under $1, though it only hits creatures and artifacts while Thassa, Deep-Dwelling doubles as a relevant blocker and win condition in devotion builds.

Price Context

Current price

$33.40 premium tier

At $33.40, Thassa, Deep-Dwelling sits firmly in the premium tier, which is warranted given her unique combination of passive blink, indestructibility, and devotion contribution — no budget card does all three. She's a long-term stable staple rather than a spike, so the price reflects genuine demand across Commander archetypes rather than hype.

Explore

Sources

Mentioned

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