Blood Weapon

[Megguido]

That’s an instant cast. Did you read the post?

A "Spell" in FFXIV doesn't mean "something with a cast bar".

Unleash, Unmend, Grit and Abyssal Drain are all spells. Instant cast spells. If BW reduces spells' GCD, it's to reduce the delay on those 4 as well as weaponskills, doesn't mean we'll be getting any form of dark magic sooner or later (but who knows ?).

You can check the action types here.