[Harkannin]

We got the Munchkin 5 De-ranged set and drew a critical hit card. The card reads "Play during any combat. All Items that give combat bonuses count double in this combat. One shot items do [I]not[I] count double."

So is this card single use only, or is it an ability that can remain in play for "any combat" like the "really impressive title" card?

I tried searching the forums and did not find the anything about critical hit cards, so my apologies if this has been answered elsewhere.