I spent an hour analyzing every frame but this is what I found most interesting
The ST Prism
As you can see. It suddenly pops up from no where. It doesn’t take any damage from the trickster. Hard to see in this gif but mana is also being used. The prism didn’t make him teleport either.
This prism can create a stationary decoy where his mouse is pointing
If you look up there is a bigger version probably an enemy
Bigger version can also bee seen here.
The ST Dagger
This is a wild guess
As you can see. They start blinking after getting shot by the dagger
This is just a wild guess. UT, ST are suppose to be unique and after releasing the Hivemaster helm everything is possible.
The Skull
Seems to curse, Might only work if you are wearing the full set
The Wand
Backwards firing, Cool idea. Also deals a lot of dammage and shoots through enemies.
The Quiver
It ignores armour.