Colossus

Gargantuan Construct (Titan), Unaligned

AC: 23

Initiative: +16 (26)

HP: 553 (27d20 + 270)

Speed: 60 ft.

STR
30 (+10)
DEX
11 (+0)
CON
30 (+10)
INT
3 (-4)
WIS
11 (+0)
CHA
8 (-1)

Saving Throws: Dex +8, Wis +8

Resistances: necrotic; radiant

Immunities: poison; psychic

Condition Immunities: charmed; exhaustion; frightened; paralyzed; petrified; poisoned; stunned; unconscious

Senses: Truesight 300 ft., Passive Perception 10

Languages: understands Celestial and Common but can't speak

CR: 25 (XP 75,000; PB +8)

Habitat: Any

Treasure: Relics

Immutable Form.

The colossus can't shape-shift.

Legendary Resistance (4/Day).

If the colossus fails a saving throw, it can choose to succeed instead.

Magic Resistance.

The colossus has Advantage on saving throws against spells and other magical effects.

Siege Monster.

The colossus deals double damage to objects and structures.

Actions

Multiattack.

The colossus makes three attacks, using Slam or Radiant Ray in any combination.

Slam.

Melee Attack Roll: +18, reach 20 ft. Hit: 32 (4d10 + 10) Bludgeoning damage, and the colossus pushes the target up to 20 feet straight away from itself.

Radiant Ray.

Ranged Attack Roll: +18, range 300 ft. Hit: 22 (4d10) Radiant damage. If the target is a Large or smaller creature, it has the Prone condition.

Divine Beam (Recharge 5-6).

Dexterity Saving Throw: DC 26, each creature in a 300-foot-long, 10-foot-wide Line. Failure: 65 (10d12) Radiant damage. Success: Half damage. Failure or Success: A creature reduced to 0 Hit Points by this beam disintegrates into dust, leaving behind any magic items it was wearing or carrying.

Legendary Actions

Legendary Action Uses: 3. Immediately after another creature’s turn, this creature can expend a use to take one of the following actions; it regains all expended uses at the start of each of its turns.

Smite.

The colossus makes one Radiant Ray attack.

Stomp.

The colossus moves up to half its Speed without provoking Opportunity Attacks, and it can make one Slam attack at any point during that move.

Find this creature in the encounter builder

Colossus

Source: Monster Manual (2025), p. 76 - Licenses and attribution