Uses "Go Away":
[49932] Go Away
Target: Single
Range: 10000'
Resist: Unresistable
Focusable: Yes
Reflectable: No
Casting: 0s
1: Fling
Text: You are pushed away.
And:
[49958] Grounding
Target: Single
Range: 10000'
Resist: Unresistable
Focusable: Yes
Reflectable: No
Casting: 0s
Duration: 24s (4 ticks), Dispelable: No
1: Inhibit Effect: Levitate
Text: You are grounded.
[49959] Grounding
Target: Caster PB
AE Range: 200'
Resist: Unresistable
Focusable: Yes
Reflectable: No
Casting: 0s
Duration: 24s (4 ticks), Dispelable: No
1: Inhibit Effect: Levitate
Text: You are grounded.
Not sure which of those two it actually uses btw (for grounding).