Transformers Spectrospear by Matrix Workshop. Windblade Combiner Hunters upgrade

The Spectrospear allows the bearer to take on a temporary spectral form - a Combiner can't hit what it can't see.

(from TFwiki.net) 
HISTORY:
Among the Original 13, Solus Prime was the maker, the one who forged the weapons and armor the Primes needed to battle Unicron.
Windblade, Chromia, and Arcee are bots formed in the image of Solus Prime. With a piece of her carried in each of their sparks, they are capable of great acts of creation... and great feats of courage.
As Decepticon Combiners unleash destruction across the universe, the Combiner Hunters are called into action. Their mission: track and destroy.Facing a Combiner alone is a nearly impossible task. But the Combiner Hunters have abilities other bots do not.
Using the power of their Solan sparks, they forge weapons that allow them to hunt the mighty Combiners and stand against them in battle.

Please note this is a 3P upgrade, so may differ from images shown. 
​​​​​​​Windblade not included.