Time Warp card - what exactly does it cancel?

[MunchkinMan]

Originally Posted by crumBat

I too would like a clarification here. We have always played that the definition of a one-shot is any card that has 'Usable Only Once' on it, but never received confirmation that this is correct.

The rules define this to be the case:

Originally Posted by The Rules

One-shot items, such as potions, may be played directly from your hand during combat. You can also use one-shot items that you already had in play. One-shot items say “Usable once only.”