Scaladar - CR 10 (Large Construct)

Since I first came across them, I have thought that the Scaladar were awesome. I mean, what's not to like about a massive metal scorpion with an electrified stinger and the ability to eat Magic Missiles (is it me, or did a lot of AD&D monsters have an immunity to Magic Missiles?). I've not actually used them very often, but hope to get to use them some time in the future. 

Anyway, a 5e conversion for you, based mostly on the 2nd Edition AD&D stats.

Large Construct (Unaligned)
Armour Class: 18 (Natural Armour)
Hit Points
: 105 (10d10+50)
Speed 40', Climb 25'
STR 20 (+5) DEX 14 (+2) CON 21 (+5) INT 2 (-4) WIS 10 (+0) CHA 2 (-4)
Damage Resistances: Acid, Fire; Slashing, Piercing and Bludgeoning from non magical weapons
Damage Immunities: Poison; Energy Absorption
Condition Immunities: Charmed, Disease, Frightened, Illusions, Poisoned, Exhaustion, Unconscious
Senses: Darkvision 60' ; Passive Perception: 14
Language: Understands creators language
Challenge: 10 (5,900 XP)

Energy Absorption: When the Scaladar would suffer force or lightning damage, it suffers none, and the damage is stored (up to a maximum of 20 points). The next time the sting hits a target, any stored energy is delivered as additional lightning damage.


Multiattack: The Scaladar makes two Claw attacks and a Charged Stinger attack

Claws: Melee weapon attack, Reach 10', +9 to hit, one target, Hit: 27 (5d8+5) bludgeoning damage, and target must make a contested Strength or Dexterity check against the Scaladar's Strength or be grappled. Whilst grappled, the target suffers automatic claw damage at the start of the Scaladar's turns. They may attempt to break free as an action on their turn, but suffer a -2 penalty due to the monster's barbed claws.

Charged Stinger: Melee weapon attack, Reach 15', +9 to hit, one target, Hit: 10 (1d10+5) piercing damage plus 4 (1d8) lightning damage. This attack is rolled with advantage against an individual grappled by the Scaladar. On a natural 18+ hit, the target must also make a D.C. 17 Constitution save, or be Paralysed until they make the saving throw (at the end of each of their turns).


Healing Protocol: The Scaladar spends any stored lightning or force damage, healing 2 hit points for every point they have. It will always spend all stored energy when using this ability, even though excess energy is wasted (this power cannot take it over its total hit points). 

Answer to my earlier question - 
there is nothing not to love about it!