Magician's Force contains a new set of cards called Union Monsters, with the ability to combine and strengthen other monsters, along with plenty of Spellcaster-Type monsters and support cards. It contains the "Amazoness" archetype and introduces the Spell Counter mechanic in which certain cards could only be played by removing a number of "spell counters" which are usually acquired by playing Spell cards.

Highly sought after cards include "Dark Magician Girl", "Breaker the Magical Warrior", "Tribe-Infecting Virus", "Magical Scientist" and "Chaos Command Magician".