Mythomagic is a collectible card and figurine game formerly played by Nico di Angelo and some Roman Legionnaires, including Frank Zhang. It involved trading cards and miniature figurines, and is focused on Greek mythology.
The rules appear to be very complicated, with similarity in rules to the rules of real-life card games like Magic, The Gathering, and tabletop role-playing games such as Dungeons & Dragons. When Nico met a mythological creature, he would often say something about their abilities within the game or whether or not he had that particular figurine.
Nico di Angelo is seen with playing with Mythomagic cards and figures multiple times early in the story. He even tried to teach Grover how to play. Nico stops Dionysus from attempting to kill Percy by telling him about his card and how Dionysus is considered the weakest god card by most players, but how he thinks his powers are "totally sweet," distracting and flustering the god enough for Percy to divert his attention.
Nico is seen burning the Mythomagic cards in a fire near the River Styx and calling it a "childish game" and saying that he "couldn't believe he ever liked this" in an Iris Message Percy was sent by Bianca di Angelo. Near the end of the book, Percy teases Nico by saying that Hades has 4000 attack points in the game, but Nico corrects saying he has 5000, but only if the opponent attacks first.
Percy, Hazel, and Frank see several First and Second Cohort members playing Mythomagic inside their base when they should be guarding their banner during the Roman War Games. Their version of the card game is believed to feature the Roman aspects of the gods.
Nico di Angelo and Frank are discussing the monsters waiting for them outside, katoblepones, with Triptolemus. Nico soon realizes (and mentions) that he actually remembers reading about the Katobleps, as it was one of the monster cards in Mythomagic. Frank speaks up, saying he played Mythomagic and never saw that card. Nico then tells him the card was in the Africanus Extreme expansion deck.
Known Mythomagic Cards/Figurines and their Powers
|Manticore||Three thousand attack power, +5 to saving throws|
|Dionysus||Five hundred attack points. He's the weakest Mythomagic god character.|
|Zeus||Lightning bolts that do 600 damage|
|Hades||4000 attack power, 5000 if opponent attacks first.|
|Apollo||+30 health, 2000 defense|
|Athena||+100 knowledge, 3000 attack|
Blood rage/infinite health for 3 rounds.
|Kronos||Infinite attack and defense power|
In the game Mythomagic, the Hades figurine was the last figurine Nico needed. Bianca took one from The Junkyard of the Gods, causing the prototype Talos to awaken. It cost Bianca di Angelo her life, due to it awakening Talos, a creation made by Hephaestus. Percy Jackson gives it to Nico di Angelo later.
In Camp Half-Blood (Real world)
Some of the Camp Half-Blood Literary camps across the country, most notably the one in Austin, Texas and Decatur, Georgia have created their own versions of Mythomagic based on the one in the book. Campers (who each control one hero) team up against a single counselor (who controls all the monsters). The game is played on Hero click boards, a miniature Greek temple, or a pyramid set (for Camp Kane, but it can be used for Camp Half-Blood also). Every year they play a championship, in which four random players are chosen to fight a boss battle (i.e.: a Titan, Cerberus, river demons, a tank, etc.). They have only had one in which nobody has died. The winner (whoever strikes the final blow) of the championship gets their own figure based on them. However, because the merchandising rights to the series were sold to Fox (along with the movie rights), no official version has been released to the general public.