Level

Special
Each Player is, at any given time, on a Dungeon Level - a number between one and ten. This should be noted on paper, or with counters, or somesuch. They are considered to share that Level with any Monsters their opponent controls.
Monsters on Level

Special
If a card says "Play only on Level X", a Player can only play it if they are on Dungeon Level X. If it says "Play only onto Level X" (for Monsters, typically), it can only be played if their Opponent is on Dungeon Level X.
Combat

Special
A Player may, as an Action, declare Combat. During Combat, a Player may discard any number of Monster cards from their hand, to represent the power of their attack. The Strength of each discarded card is considered to be a Strike against a chosen Monster in play - if the total of Strikes against a Monster exceed that Monster's Strength, it is destroyed.
Stairs

Special
If a Player faces no Monsters (that is, their Opponent controls no Monsters) they may - as an Action - go up or down a Staircase, incrementing or decrementing their Dungeon Level accordingly. Players may not go down from Level Ten.
Equipment

Special
A Player may take an Action to discard any amount of Equipment they have in play, unless they have had the "Cursed!" card played onto them.
Weapons

Special
Players may only use a single Weapon during combat.
Amulet of Yendor

Thing
Play only on Level Ten. If you move up from Level One, you win the Game.
+1 Dagger

Thing
You may add one to the Strength of a single discarded Monster card, during combat.
Goblin (2)

Thing
Giant Bat (1)

Thing
+2 Short Sword

Thing
You may add two to the Strength of a single discarded Monster card, during combat.
Floating Eye (1)

Thing
If Floating Eye is destroyed, the Player who destroyed it may look at its controller's hand. Action: Your Opponent may not play Actions during his or her next turn.
Sacrificial Altar

Action
Shuffle up to three Monsters from the discard pile into the draw pile. Draw as many cards.
Scroll of Teleportation

Action
Move yourself up or down three Dungeon Levels.
Orc (3)

Thing
Play only onto Level 3 or higher.
Wand of Fire

Thing
Action: Discard two cards to destroy a Monster with Strength 5 or less.
Nothing Happens

Action
Destroy a Wand.
Boots of Speed

Thing
You may play two Actions per turn.
Cockatrice (2)

Thing
Play only onto Level 6 or higher. Can only be killed by a Player with a Weapon.
Skeleton (3)

Thing
+3 Battle-Axe

Thing
You may add three to the Strength of a single discarded Monster card, during combat.
Trapdoor

Action
Increment a chosen Player's Dungeon Level, or destroy a Monster.
Magic Trap

Action
A chosen Player draws a card and discards a card at random.
Wand of Taming

Thing
Action: Discard three cards to gain control of a Monster.
Scroll of Fire

Action
Discard two cards. Destroy a Monster with Strength 5 or less.
Red Dragon (7)

Thing
Play only onto Level 7 or higher.
+1 Bow

Thing
You may add one to the Strength of a single discarded Monster card, during combat.
Blessed +2 Stormbringer

Thing
You may add two to the Strength of *all* discarded Monster cards, during combat.
-1 Dagger

Thing
Play onto an Opponent. You *must* subtract one from the Strength of a single discarded Monster card, during combat.
Prayer

Action
Destroy a "Cursed!" card, or discard a "Sacrificial Altar" card to draw four cards.
Bag of Holding

Thing
You need not discard cards at the end of your turn.
Scroll of Summon Monster

Action
Put any Monster card into play from your hand, irrespective of your opponent's Dungeon Level.
Kobold (2)

Thing
Wand of Polymorph

Thing
Action: Destroy a Thing and replace it with a Thing of the same type (Monster/Equipment) from your hand.
Treasure Chest

Action
Draw three cards, unless your Opponent chooses to discard a Trap card from their hand, in which case you must discard three cards.
Mimic (2)

Thing
Play only onto Level 4 or higher. When Mimic comes into play, you may destroy a piece of Equipment that your Opponent played last turn.
Killer Bee (1)

Thing
Action: Opponent discards a card at random.
Gelatinous Cube (2)

Thing
Ogre (4)

Thing
Play only onto Level 3 or higher.
Nymph (2)

Thing
Play only onto Level 3 or higher. Action: Return a piece of your Opponent's Equipment to their hand. They may not play it again while Nymph is in play.
Cursed!

Thing
Play onto an Opponent. They cannot use the "discard" Action, and must always choose their weakest Weapon in combat.
Zombie (2)

Thing
Holy Water

Action
Destroy a "Cursed!" card, or destroy an undead Monster.
Welcome to Asidonhopo's!

Action
Play only on Level 3 or higher. Discard two cards to search the draw pile for a piece of Equipment, and put it into your hand.
Scroll of Magic Mapping

Action
Search the draw pile for an Altar or Trap or Asidonhopo card and put it into your hand.
+1 Mace

Thing
You may add one to the Strength of a single discarded Monster card, during combat.
+0 Dagger

Thing
No combat bonus.
-2 Long Sword

Thing
Play onto an Opponent. You *must* subtract two from the Strength of a single discarded Monster card, during combat.
Water Trap

Action
Choose a Player. Destroy a random piece of Equipment belonging to them.
Amulet of ESP

Action
Action: Look at your Opponent's hand.
Minotaur (6)

Thing
Play only onto Level 8 or higher.
Wizard of Yendor (3)

Thing
Play only onto Level 10. Action: Destroy the Amulet of Yendor.
Troll (3)

Thing
When Troll is destroyed, the Player who controlled it may discard two cards to return it to their hand.
Potion of Speed

Action
You may play any number of Actions this turn, but may not use two Actions in the same way. (eg. descending two flights of stairs.)
Cursed!

Thing
Play onto an Opponent. They cannot use the "discard" Action, and must always choose their weakest Weapon in combat.
Cursed!

Thing
Play onto an Opponent. They cannot use the "discard" Action, and must always choose their weakest Weapon in combat.
Cursed!

Thing
Play onto an Opponent. They cannot use the "discard" Action, and must always choose their weakest Weapon in combat.
Brass Lantern

Action
You are granted a wish! Search the draw and discard pile, and your opponent's hand, putting a card of your choice into your hand.
Wand of Invisibility

Thing
Action: Discard two cards; you may not be targetted by Actions until your next turn.
Umber Hulk (4)

Thing
Play only onto Level 5 or higher. Action: Choose a card at random from your opponent's hand. Your opponent must play that card immediately, regardless of Level.
Rust Monster (3)

Thing
Play only onto Level 2 or higher. If Rust Monster is killed using a Weapon other than a Bow, destroy that Weapon.
Green Dragon (7)

Thing
Play only onto Level 7 or higher.
Leprechaun (1)

Thing
Play only onto Level 2 or higher. If Leprechaun is destroyed, your Opponent may draw three cards. Action: Opponent discards a card.
Wand of Teleportation

Thing
Action: Discard two cards to return a Monster to its owner's hand.
Amulet of Reflection

Thing
If you are targetted by an Action, you may discard two cards to reflect that Action back at your Opponent.
"Elbereth"

Thing
You may not be affected by Monsters' Actions. Whenever you declare Combat or tread a Staircase, destroy this card.
Spellbook

Thing
Action: Search the discard pile for a Scroll card and put it into your hand.
Ghost (5)

Thing
Play only onto Level 4 or higher. When Ghost is destroyed, your Opponent may draw and reveal five cards, discarding any non-Equipment ones.
Teleport Trap

Thing
Move a Player up or down two Dungeon Levels.
Scroll of Amnesia

Action
Discard your hand.
Prayer

Action
Destroy a "Cursed!" card, or discard a "Sacrificial Altar" card to draw four cards.
Grid Bug (1)

Thing
Any Player may, as an Action, discard a card to return Grid Bug to its owner's hand.
Wand of Nothing

Thing
Action: Nothing happens.
Opulent Throne Room

Action
Play only onto Level 4 or higher. Draw six cards. Put any Monsters into play under your control, give any Equipment to your opponent, and discard any Actions.