Niagra Ref for Get-All call

Hey all

I have a system where I Spawn/Destroy scenes on demand.
In a few scenes I have Niagra systems being creates via “Spawn System at Location”
When I destroy those scenes, I use mostly “Get All Objects with Tag” so all the relevant objects get destroyed via another Blueprint.

How can I reach all the Niagara systems to destroy them as well? I tried setting it this way but it didn’t work:
image

Is there a way?

Thanks in advance and happy NYE!