munchkin booty rule clarification

[supremeny]

Hello,

I am looking for resolution to a question.

Munchkin booty, the card dehydration. Forgetting the entire context/wording. but kills a single monster in combat with the word "water" or "sea" in its name " ... or can be played at any time to cancel any such card"

what is the ruling on this?

1 - can this cancel ANY card played
or
2 - this card may at any time cancel any card specifically with water or sea it its name

thank you