Arnyek's Bound Shadow

Bound Soul. Arnyek's Bound Shadow cannot leave this plane of existence willingly or unwillingly due to a red seal that binds both the shade and the armor to Arnyek's service.

Need for Growth. If Arnyek's Bound Shadow has the lowest initiative count it grows substantially in size. It becomes huge, gains +4 to its to hit bonus, does an extra damage dice for each attack it makes and gains +5ft of reach in melee attacks.

Back up plan. If Need for Growth is not activated Arnyek's Bound Shadow grows two extra legs becoming quadrupedal. It makes one extra attack per round and it's movement speed is doubled.

Unholy Seal. If the seal on the suit of armor is hit with radiant damage the armor disintegrates.This monster now assumes the form of and has the statistics of Arnyek's Shade.

Dormant. While Arnyek has no use for the Bound Shadow it lies dormant. While dormant the Shadow is immune to all types of damage and cannot be affected by any conditions. It wakes up when Arnyek wills it to do so.

Multiattack. Arnyek's Bound Shadow makes one slam attack followed by two punch attacks.

Slam. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 19 (2d12 + 6) bludgeoning damage. 

Punch. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage.