Kokomu no Masamune is approved.
Shadow longsword is approved, and I guess your secondary element is shadows, making your Elemental Affinity both illusion and shadows?
Technique Name: Shadow tentacles/arms
Technique Description: Luke can manifest either eight tentacles (four on each side) or four, large additional shadow arms that float with two floating either side of his shoulders and two floating just under his own arms, his tentacles can be used to wrap around opponents, used as whips or like ropes for other uses while the arms can grab and attack using strong punches. the additional tentacles/arms can be cut off like regular body parts, although their skin is armored with dragon-like scales, they can be cut through, given a fast and hard cut to it, Although Luke can reform them but not instantly. Reform takes two posts per part cut off/destroyed, when deactivated, takes a six post cooldown before reuse or never if Luke runs out of Reiatsu before the cooldown ends
Technique Effect Chart:
*The effect chart is for damage, durability, or any other after effect of a technique. The damage/effect/etc will be based off of tiers.*
Opponent is Two+ Tiers Lower: Tentacles are highly effect in inflicting damage and trapping tiers of this type, arms produce large damage to include broken bones, takes three cuts of a shikai released weapon to cut through the tentacles or arms
Opponent is One Tier Lower: Tentacles have a descent effect in inflicting damage and trapping tiers of this type, arms produce descent damage to include some broken bones, takes two cuts of a shikai released weapon to cut through the tentacles or arms
Opponent is Equal Tier: Tentacles have a good effect in inflicting damage and trapping tiers of this type, arms produce a good amount of damage to include a few broken bones, takes one cuts of a shikai released weapon to cut through the tentacles or arms
Opponent is One Tier Higher: Tentacles have a hard time in inflicting damage and trapping tiers of this type, arms produce a ok amount of damage, including some brusing and other noticable punch damage, takes two cuts of a sealed weapon to cut through the tentacles or arms
Opponent is Two+ Tiers Higher: Tentacles have a very hard time in inflicting damage and trapping tiers of this type, arms produce nearly no noticeable amount of damage, only useful in stopping attacks or doing basic punch damage, takes one cut of a sealed weapon to cut through the tentacles or arms
Technique Name: Wall of shadows
Technique Description: Luke can shape his shadow to protect himself from attacks from close quarters attacks equal to a sealed zanpakuto and hado techniques under #40 without incantation. Takes three posts to cooldown before reuse or never if Luke runs out of Reiatsu
Technique Effect Chart:
*The effect chart is for damage, durability, or any other after effect of a technique. The damage/effect/etc will be based off of tiers.*
Opponent is Two+ Tiers Lower: Needs shikai level techniques to break through which it can take three of before breaking apart, the same for kido under #40
Opponent is One Tier Lower: Needs shikai level techniques to break through which it can take two of before breaking apart, the same for kido under #40
Opponent is Equal Tier: only needs sealed state to be take out, takes three attacks before breaking, Same for kido under #40
Opponent is One Tier Higher: only needs sealed state to be take out, takes two attacks before breaking, Same for kido under #40
Opponent is Two+ Tiers Higher: Only needs the opponent's bare hands to take out, can take two attacks before breaking down, Same for kido under #40
I need post counts for how long these last. "Until he runs out of reiatsu" is extremely vague.
Looking over your other techniques but am posting these early because of the site lag today.