Epic

Epic is a keyword ability that changes the rules for playing spells for the player that plays the epic spell. When an epic spell resolves, it restricts the player who played it from playing anymore spells for the rest of that game. The keyword was introduced in Saviors of Kamigawa and has appeared on the following five spells:

Endless Swarm, Enduring Ideal, Eternal Dominion, Neverending Torment and Undying Flames.

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Further references may be found in the Comprehensive Rules.