[The guys are playing Mystic Warlords of Ka'ah]
Raj: Water demon.
Howard: Ice dragon.
Leonard: [victorious tone of voice] Lesser Warlord of Ka'ah!
Sheldon: Not so fast! Infinite Sheldon.
Leonard: Infinite Sheldon?!
Sheldon: Yes, Infinite Sheldon defeats all other cards, and does not violate the rule against homemade cards because I made it at work.
Leonard: Do you understand why people don't want to play with you?
Sheldon: No. Although it's a question I've been pondering since preschool.

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