Mr. Cat. Hold on I think I know my next move, just give me another minute....NO!!!!!!!
Some of the trap cards explicitly say (either on the card or in the reference) that you resolve the effect with the hand you've currently played.
But not all cards do. We encountered several dire trap cards that we weren't sure whether it applied to the hand just played.
I assume it must since it would make little sense otherwise.
Remember in the rule book 4f and 4g happen before step 5. Page 24 in the rule book does pretty well on the order of operands.
Cage - (active player) effects the hand you just beat the prior monster with and cages a hero of choice in the party youjust defeated that monster with.
Gas trap - (all players) Use the hand you just defeated or pushed a monster to the bottom of the stack with. If there is a cleric or thief in hand you just went into the dungeon with then you do not get a disease card.
Poison Dart trap - (everyone else except active player who went into the dungeon) - Basically hits everyone behind you with darts to remove spells. Becasue the casters are always in the back =)
After you resolve onr of these trap effects first. Now you can discard, and hand the turn over to the next player. Or draw and start your next turn if playing solo.