Going deep...

In the newest episode of Kamen Rider Ghost, Ghost's friend and fellow Rider Specter, just got a new form. It's called Deep Specter, and as you can see from the pictures below, it does more than just give Specter a new look. In addition to extra strength, it gives him a sword that's kinda like the one Ghost got from his Boost form. Meaning that when Ghost borrows Specter Eyecon's, for his Grateful form, Specter can still help without giving up any power.

Specter, untransformed and transformed 

Kamen Rider Deep Specter