I’ve had a little trouble coming up with cards that work directly with threats. But here’s one that should prove pretty useful with the new Gollum...enjoy!

A Hiss and a Splash
Event • Skirmish
Make Gollum strength +2 (or +3 if the fellowship is at a river). Then you may remove a threat to return this event to your hand.
“A long whitish hand could be dimly seen as it shot out and grabbed the gunwale; two pale lamplike eyes shone coldly as they peered inside, and then they lifted and gazed up at Frodo on the eyot.”