Help Adding Effects (Shadow/DuplicatingSprite) on 2d Side-Scroller (Alucard-SOTN)

Hello fellow developers, I’m trying to recreate Alucard gameplay from Castlevania Symphony of the Night.
That’s what I achivied so far.

But in the original game Alucard have some kind of blue shadow effect, I want to know how could I replicate that effect.

Thanks for the help.