Telluric Power: What if the Enemy is Prone?

[Bast L.]

Telluric Power reads:

"You channel strength from the earth beneath your feet to pummel your enemies. When making a melee Strike against a target who is standing on the same earth or stone surface as you are, you gain a circumstance bonus to the damage roll equal to the number of weapon damage dice."

Is the "standing" somewhat flavorful? Or does it not work on prone targets? What about targets without legs, like Oozes? Probably works on Oozes (stand isn't really defined, except as the action to end prone).

[Nocte ex Mortis]

‘Standing’ is just kind of a flowery, shorter way of saying ‘is connected by some appendage roughly approximating a foot, or more, to the ground.’ I’d say being prone is preeeety connected to the ground.