Registeel (5e Creature)
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Large construct, lawful neutral
Saving Throws Str +12, Con +12, Wis +9
Immutable Form. Registeel is immune to any spell or effect that would alter its form.
Magic Weapons. Registeel's weapon attacks are magical.
Magic Resistance. Registeel has advantage on saving throws against spells and other magical effects.
Clear Body. Registeel is immune to any effect that would cause it to gain disadvantage on attack rolls, ability checks, or saving throws.
Damage Threshold. Registeel has immunity to all damage unless it takes an amount of damage that equals or exceeds 10.
Multiattack. Registeel makes two Iron Head attacks and two Flash Cannon attacks. It can replace any two attacks with a Steel Roller or a Steel Beam attack, available.
Iron Head. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 6) bludgeoning damage.
Flash Cannon. Ranged Spell Attack: +12 to hit, range 80/320 ft., one target. Hit: 19 (3d8 + 6) force damage.
Steel Roller (Recharge 5-6). Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 33 (6d8 + 6) bludgeoning damage, and the target must succeed on a DC 20 Strength saving throw or fall prone.
Steel Beam (Recharge 5-6). Ranged Spell Attack: +12 to hit, range 80/320 ft., one target. Hit: 28 (5d8 + 6) force damage, and the target must succeed on a DC 20 Constitution saving throw or be stunned until the end of its next turn.
Superpower (1/day). Registeel regains 100 hit points. Until the end of it next turn, it has disadvantage on all attack rolls, and attack rolls against it have advantage.