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Ulamog's Dreadsire

Creature — Eldrazi

Vigilance
Ward—Sacrifice a permanent with mana value 1 or greater.
{T}: Create a 10/10 colorless Eldrazi creature token.

CMC
10
Mana cost
{10}
Color identity
C
Rarity
rare
Set
Modern Horizons 3 Commander
Price
$3.17
EDHREC rank
#3366
Buy on TCGplayer
Ulamog's Dreadsire card art
Ulamog's Dreadsire puts a 10/10 indestructible Eldrazi on the board whenever it attacks and deals combat damage to a player — and it costs zero mana to spawn those tokens, which means any loop that keeps untapping it snowballs instantly. Pair it with Intruder Alarm and a tap outlet and the triggers compound; Xu-Ifit, Osteoharmonist turns those Eldrazi Spawn into recursive combo fuel on the same turn.

Best Commanders

Commanders with the highest synergy

01
Xu-Ifit, Osteoharmonist

Xu-Ifit, Osteoharmonist

45.4% of decks · synergy 0.45

Xu-Ifit, Osteoharmonist treats the zero-cost Eldrazi Spawn tokens Ulamog's Dreadsire generates as perfect recursive material, sacrificing them to trigger bone-assembling loops that can convert a single combat step into a full engine.

02
Ulalek, Fused Atrocity

Ulalek, Fused Atrocity

40.2% of decks · synergy 0.38

Ulalek, Fused Atrocity copies every Eldrazi cast trigger, so when Ulamog's Dreadsire hits an opponent and spawns a free 10/10, the copy effect magnifies the board state across every Eldrazi entering play that turn.

03
Mairsil, the Pretender

Mairsil, the Pretender

29.1% of decks · synergy 0.29

Mairsil, the Pretender can cage Ulamog's Dreadsire and activate its attack-trigger ability from the command zone, turning an otherwise expensive creature into a repeatable source of free indestructible bodies without ever needing to cast it.

04
Ultima, Origin of Oblivion

Ultima, Origin of Oblivion

29.1% of decks · synergy 0.16

Ultima, Origin of Oblivion rewards fielding high-power colorless threats, and Ulamog's Dreadsire feeds the engine by spawning additional indestructible Eldrazi that keep the battlefield threatening every combat.

05
Jhoira of the Ghitu

Jhoira of the Ghitu

15.3% of decks · synergy 0.15

Jhoira of the Ghitu suspends Ulamog's Dreadsire for two mana and two turns, bypassing the full casting cost and landing a combat-damage engine far ahead of schedule.

Format Analysis

Where it lives, where it can’t

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

Commander is where Ulamog's Dreadsire actually lives — the singleton format's long game gives it time to connect in combat, and the multiplayer table means three opponents to trigger free 10/10s off. Legacy and Vintage both allow it, but a nine-mana creature with no immediate protection on entry competes against formats where the game ends on turn one or two, making it a fringe curiosity at best in those contexts. Modern, Pioneer, Standard, and Pauper are all off the table entirely. Oathbreaker is legal but shares the same problem as Legacy: the format moves too fast for a nine-drop that needs to attack to pay off.

Key Combos

Combo lines featuring this card

506 decks
Ulamog's DreadsireIntruder Alarm

Ulamog's DreadsireIntruder Alarm

Infinite creature tokens; Infinite ETB; Infinite mana creatures you control can produce; Infinite untap of creatures; Infinite untap of creatures you control

View on Commander Spellbook ↗

Price Context

Current price

$3.17 cheap tier

At $3.17, Ulamog's Dreadsire sits in the cheap tier — accessible for any budget building around Eldrazi tokens or tap-loop combos. The price reflects genuine demand from Xu-Ifit and Ulalek players rather than casual novelty, so it's unlikely to crater.

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Sources

Mentioned

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