Can Nun Slap! prevent Survivor abilities?

[DarthBayne]

Since Nun Slap! only ignores an ability until the end of the fight, does that mean Survivor is an ability which Nun Slap! is incapable of preventing?

For instance: If my opponent has hired a Combo Rat, and I committed no weapons or Allys, can I play Nun Slap! to prevent the Combo Rat's Survivor ability from triggering?

Thank you in advance!