Immutable Form. Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ is immune to any spell or effect that would alter its form.

Legendary Resistance (3/Day). If Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ fails a saving throw, it can choose to succeed instead.

Magic Resistance. Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ has advantage on saving throws against spells and other magical effects.

Siege Monster. Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ deals double damage to objects and structures.

Towering Terror. Any enemy outside Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ that starts its turn within 30 feet of it must succeed on a DC 26 Wisdom saving throw or be frightened until the start of the enemy’s next turn. If the enemy’s saving throw is successful, it is immune to Towering Terror for the next 24 hours.

Multiattack. Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ makes three attacks — one with its slam and two with its eldritch turrets — and then uses Stomp.

Slam. Melee Weapon Attack: +18 to hit, reach 20 ft., one target. Hit: 29 (3d12 + 10) bludgeoning damage, and the colossus can push the target up to 20 feet away from it.

Eldritch Turret. Ranged Spell Attack: +18 to hit, range 300 ft., one target. Hit: 18 (4d8) force damage, and if the target is a creature, it is knocked prone.

Stomp. Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ stomps one of its feet at a point on the ground within 20 feet of it. Any creature in a 20-foot-radius, 20-foot-high cylinder centered on this point must succeed on a DC 26 Dexterity saving throw or take 33 (6d10) bludgeoning damage and fall prone. Until Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ uses its Stomp again or moves, the creature is restrained. While restrained in this way, the creature (or another creature within 5 feet of it) can use its action to make a DC 26 Strength check. On a success, the creature relocates to an unoccupied space of its choice within 5 feet of Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ and is no longer restrained.

Structures, as well as nonmagical objects that are neither being worn nor carried, take the same amount of damage if they are in the cylinder (no save).

Incinerating Beam (Recharge 1d6). Π̵̩̲̩̞̽̈́͒́̉̒̚͘̕ο̸͔̈́̅́͗͆̋̇̄̚͝λ̴̢͈͑̐ι̴̨͓̣̒̽̽͑̇͠͝͝ο̵̮͈͐͆̍͜͠ρ̴̛̪̹̒̀̃͆͊̀̋͐κ̵̭͇͙̀̅͐̂̀̀͒̌͑͌̅̕ί̴͕͖̹̳͎̮͉̀̽̈́̓̚͜͜α̴̨̛͔̤̮̙̞̺̘̯̘̲̈̅̔̏̀͜͝ fires a beam of light in a 150-foot line that is 10 feet wide. Each creature in the line must make a DC 26 Dexterity saving throw, taking 60 (11d10) radiant damage on a failed save, or half as much damage on a successful one. A creature reduced to 0 hit points by this beam is disintegrated, leaving behind anything it was wearing or carrying.