"Are you pondering what I'm pondering Pinky?"
"Wuhhh... I think so, Brain, but if a ham can operate a radio, why can't a pig set a VCR?"
My question would be, if you play a spell and use its effect is it still considered in your hand? Use the effect on your hero? Equip a weapon?
I know that you cannot destroy cards with dungeon abilities if you have already used their ability, but they can later be destroyed by a Battle or Aftermath ability. Do discards work in the same manner?
Cards are in your hand until discarded or destroyed.
A card that has been used for an effect cannot be destroyed or discarded unless by a battle or aftermath ability.