Mystic Warlords of Ka'a

Mystic Warlords of Ka'a is a fictional trading card game that first appeared in "The Creepy Candy Coating Corollary" (S03E05). Sheldon, Leonard, Raj, and Howard all enjoy playing it. Sheldon and Raj lost against Wil Wheaton and Stuart in the comic book store tournament.

The Big Bang Theory blog released a photo of the Enchanted Bunny card and wrote "Here’s your first look at "Mystic Warlords of Ka’a" cards – more details to be revealed @ Comic Con 2011", followed by the release of the photo of several other cards, timed a few days apart. The game is an obvious spoof of "".

Known Cards

 * Creepy teepee
 * Phantom Warlord
 * Strangling Vines
 * Ruby Sword
 * Enchanted Bunny
 * The Carrot of Power
 * Necromancer Potion
 * Jewel of Osiris
 * Enchanted Troll
 * Screaming Harpy
 * Cursed Mace
 * Endless Serpent
 * Ecstatic Frenzy
 * Chaos Overlord
 * Molten River
 * Nightshade Dryad
 * Lava Serpent
 * Nest of Snakes
 * Underworld Guardian
 * Invisibility Spell
 * Luminesence Spell
 * Water Nymph
 * Fire Demon
 * Two-Headed Tiger
 * Three-Headed Lion
 * Sulfur
 * Brimstone
 * Small Rock
 * Potion of Zancor
 * Water Demon
 * Ice Dragon
 * Lesser Warlord of Ka'a
 * Infinite Sheldon (an illegitimate card as it was made by Sheldon)
 * Troll Master
 * Walking Tree
 * Mountain Elf
 * Hellhounds
 * Colossal Serpent
 * Rotting Zombie
 * Zandor, Wizard of the North
 * Gelatinous Sphere
 * Focused Locust
 * Temple of Yip
 * Lesser Demon Turtle
 * Fairy God Monster
 * Two Eyed Cyclops
 * Raging Ogre
 * Bi-Polar Bear
 * Hairy Fairy

Satanimals expansion pack
First mentioned in "The Flaming Spittoon Acquisition" (S05E10), this expansion was derided as a blatant money-grab by the publisher.
 * Hellephant
 * Beelzebobcat
 * mr fuk

Wild West and Witches expansion pack
Also first mentioned in "The Flaming Spittoon Acquisition", it comes in both a regular edition and a where the cards come in a numbered tin along with a  that doubles as a  due to it being attached to a telescoping pole.
 * The White Wizard of the North
 * Helmet of Confusion
 * Tribe of Abra-
 * Flaming
 * Creepy
 * Hocus Pocus
 * Creepy
 * Hocus Pocus
 * Hocus Pocus

Facebook game
There was an official licensed version of the game called The Big Bang Theory: Mystic Warlords of Ka'a made by Dire Wolf Digital Games. It was shut down on June 29, 2012.