https://docs.median-xl.com/doc/class/assassinBATSTRIKE
The Viz-Jaq'Taar prefer subterfuge over raw strength. This technique uses her blades to channel her psychic powers, allowing her to unleash various supernatural effects.
Effect: melee attack that summons bats or converts enemies
The effect changed, text is not correct anymore.
SINGULARITY
This device creates a local gravity well. Although the vortex is too small to suck in enemies, the tidal effects wreak havoc on those who approach the event horizon.
Effect: trap that creates a black hole
This spell does not create a black hole.
Here is the NASA definition of a black hole:
"A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space."
The buzzword is gravity, that spell has 0 gravity, enemies just walk through it.