I think I understand, but I just want to be sure.
Let's say Player 1 is playing a wizard, and encounters a monster.
He has a damage spell, a quarterstaff and an item, Blast Stone (banish to add 1d4 to a combat check at your location).
So, Player 1 can now use either the spell, or reveal the weapon to do the check.
Player 1 can also use one item, in this case the Blast Stone to enhance this attack, correct?
Let's say Player 2 is at the same location, and also has a Blast Stone (or other beneficial item), can he now help player with his item card too(in addition to Player 1's Blast Stone)?
I guess I am a little unsure about the encounter rules that say 1) each player can only play one of each type, 2) you and you alone can do the check, and 3) other players can help you(which I interpreted from the multiple blessings example on page 10 of the rulebook).