Change Niagara Effect upon Custom Event

Hello everyone,

Can you help with finding a way to change the Niagara effect of the Pawn_BP upon activating an Custom Event?

In this case, on Custom Event Change Size (in another BP) I want the trail of the Slime_BP to change to a different Niagara Effect with a different color.

Niagara Effects
image

image

I tried with a Cast To but didn’t work.

This is the best I could get but it’s not working for obvious reasons

Any ideas?

Very much apreciated!