Can I decide at any time not to fight a monster?

[snarky]

Originally Posted by fuelstaind

So does this mean that if you used a couple one shots, they can be returned? Another question, at what point does a one shot item become used? I mean, if you are looking through your items and say; "If I use these items, I will have a combat strength of 21 and be able to beat the Plutonium Dragon." Does that mean they are used? And then if, as the original poster stated, some plays a monster enhancer that no longer allows you to beat the monster, do you lose your one shots?

The cards are "used" when they are played to the table during combat. It's one thing to say "if I used these, I would beat the monster" and "I'm using these to beat the monster; my combat strength is now X and I am winning."

We put combat modifiers in the center of the table when they're used, so there's no question whether they're "in play" or not.