Talk:Exodia/@comment-39991638-20190701022209

Mind Drain does not prevent Exodia, The Forbidden One from winning the duel, as the effect is a condition and does not activate. Mind Drain only prevents effects from activating, and Exodia's Duel winning effect is a condition on the duel.

A similar example is Outer Entity Azathot, which when summoned negates all monster effects for the rest of the turn. Due to the phrasing of Azathot (and Exodia by extension), This effect cannot be negated or even chained to. This is why cards like "The Phantom Knights' Rank Up Magic Launch" and "Tellarknight Ptolemaeus" are banned, as they allow for Azathot to be Summoned during the Opponent's Turn.

For more information, see https://yugioh.fandom.com/wiki/Problem-Solving_Card_Text