Gen, Confider of Ages is a mythic Legendary Creature — Human Wizard card from Unknown Event (UNK), collector number MZ03.
Gen gets +1/+1 for each different year of release among other nontoken permanents you control. (For example, if a card was released in 1993, that's one year of release. Specific editions matter.) Whenever Gen attacks, if its power is 30 or greater, you win the game.