Chosen at random

[Avodroc13]

{Scab-Clan Giant} enters the battlefield, only creature my opponent has, has hexproof. What happens?

[particle]

its the same as if he had no creatures on the field. theres no legal target so the ability cant resolve.

[Pleeb]

Follow-up question:  opponent has 3 creatures, 1 with hex proof. Is the hexproof creature included in the randomization of creatures?

[particle]

since the giant uses the word "target" and a hexproof creature isnt a valid choice, it wont be included in the random selection.