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Path of Exile: x ∋ x ∉ aₙ ∀ aₙ
"In Path of Exile: x ∋ x ∉ aₙ ∀ aₙ, The Maven has learned much from her interactions with you. Simple Memory Games no longer entertain her. Instead, The Maven will now challenge you with advanced combinatorics problems while pelting the arena with Axiomatic Meteors. Demonstrate your rigor, or demonstrate your mortis!"