I've put together a bunch of example cards - enough that people could make decks and try it out, although I'm sure the balance is way off. Probably needs some higher-end cards, too.
Card name Cost Keywords Effect
Healing Potion Hero 0 Tool Heal 2, expendable
Dagger Hero 1 Tool, Weapon Fight 1
10-Foot Pole Hero 1 Tool Cunning 1
Savviness Hero 1 Skill Wisdom 1
Explosive Arrow Hero 1 Tool Fight 5, expendable
Potion of Invisibility Hero 1 Tool Cunning 5, expendable
Accurate Rumors Hero 1 Tool Wisdom 5, expendable
Broadsword Fighter 1 Tool, Weapon Fight 3
Chainmail Fighter 1 Tool, Armor Physical Armor 1
Lockpicks Thief 1 Tool Cunning 3
Shortbow Thief 1 Tool, Weapon Fight 2, Cunning 1
Fireball Wizard 1 Spell, Fire Fight 3
Painstaking Research Wizard 1 Skill Wisdom 3
Scroll of Teleport Wizard 1 Tool, Spell Defeat one Obstacle, Expendable
Regeneration Cleric 1 Spell Heal 2
Turn Undead Cleric 1 Skill Fight 4, Cunning 4, Wisdom 4, against Undead only
Battleaxe Fighter 2 Tool, Weapon Fight 6
Veteran's Eye Fighter 2 Skill Fight 3, Cunning 1, Wisdom 1
Enchanted Shield Fighter 2 Tool, Armor Fight 1, Physical Armor 2
Acrobatics Thief 2 Skill Fight 3, Cunning 3
Careful Planning Thief 2 Skill Cunning 3, Wisdom 3
Scrying Wizard 2 Spell Cunning 2, Wisdom 4
Life-Draining Staff Wizard 2 Tool Every time you defeat a monster, heal 4
Blessed Mace Cleric 2 Tool, Weapon Fight 3, Wisdom 3
Holy Protection Cleric 2 Spell Physical Armor 1, Magic Armor 1
Card name Cost Keywords Defeat Effect
Kobold Recruit Danger 0 Monster Fight 1, Cunning 1 Physical 1
Spear Trap Danger 0 Trap Cunning 2 Physical 3, Expendable
Goblin Grunt Danger 1 Monster Fight 4, Cunning 2 Physical 3
Goblin Sparkmage Danger 1 Monster Fight 2, Cunning 4 Magic 3
Skeletal Beast Danger 1 Monster, Undead Fight 4, Wisdom 2 Physical 3
Labyrinth Danger 1 Obstacle Cunning 5, Wisdom 5 Mental 1
Hostage-Taker Danger 1 Monster Fighting 1, Cunning 8 Mental 1, destroy one hero power card if defeated with Fighting
Potion of Confusion Danger 1 Trap Wisdom 4 Opponent discards his hand, expendable
Ogre Danger 2 Monster Fight 6, Cunning 4 Physical 4
Phantom Danger 2 Monster, Undead Cunning 7, Wisdom 4 Magic 4
Pit Viper Danger 2 Monster, Animal Fight 3, Cunning 3 Physical 8
Imp Danger 2 Monster, Demon Fight 7, Wisdom 5 Magic 3
Acid Trap Danger 2 Trap Cunning 7 Magic 3, destroy one tool, expendable
Trapped Hallway Danger 2 Trap Cunning 4 Physical 4
Cursed Jewel Danger 2 Trap Wisdom 4 Magic 3
Zombie Hordes Danger 2 Monster, Undead Fight 5 Physical 4
Underground River Danger 2 Obstacle Cunning 8, Wisdom 9 None
Thieving Specter Danger 3 Monster, Undead Cunning 4, Wisdom 3 Magic 1, destroy one tool
Goblin Tinker Danger 3 Monster Fight 6, Cunning 5 Your traps get +1 difficulty
Orcish Warlord Danger 3 Monster Fight 5, Wisdom 6 Your monsters get +1 damage
Golem Danger 3 Monster Fight 8, Cunning 7 Physical 6
Voodoo Doll Danger 3 Ritual Cunning 3, Wisdom 3 Magic 4, cannot be attacked if you have an obstacle in play
Chant of Decay Danger 3 Ritual Fight 3, Wisdom 3 Opponent's tools get -1 strength, cannot be attacked if you have a monster in play
Rune of Reanimation Danger 3 Ritual Wisdom 6 Take an Undead card from your graveyard and return it to play. You still need sufficient Danger to support it.
Rune-Scribed Door Danger 3 Obstacle Cunning 12, Wisdom 10 Magic 2
Land Mine Danger 3 Trap Cunning 10 Physical 10, expendable