The game is a contest of arms between two warriors from numerous historical periods. Each game lasts a maximum of five rounds. The game is unusual for a card game in that it does not use shuffling as a randomization technique. Anachronism "decks" consist of five cards, and players do not draw cards or have a "hand" of cards. Despite the relatively small number of cards used in each game, card interactions and strategy can become surprisingly intricate, especially in the later rounds. Each player places his chosen warrior card on the playmat and his four support cards, face down, in slots corresponding to the first four rounds. The support cards may be any combination of inspiration, weapon, armor, or special cards. Each player flips his leftmost face-down support card at the beginning of each round. Initiative numbers on the support cards determine which player goes first in each round. The warrior cards may move and be turned (faced) as in a miniatures game. Support cards represent a variety of historical weapons, armor, items, deities, people, places or concepts such as the Norse sverd or Japanese book Go Rin No Sho. The game's name is derived from the ability to mix the various support cards such that the ancient Greek Leonidas wearing a kimono may fight a Japanese ninja who is wielding a gladius. Dice are used by both the attacker and defender to determine the outcome of battles.