IE: Does the reminder text serve to remind that creatures attached to Adventure subtypes can be cast from exile, or does resolving an Adventure create an additional effect that allows you to cast the attached creature from exile?
5 Teferi, Time Raveler Changed The Pace Of Play The War Of The Spark set focused heavily on the Planeswalker card type, printing a huge number and giving a great number of passive abilities in addition to their activated abilities
Aside from that, a handful of one-off cards also watch the clock
Your options to kill a Gideon are pretty tough
7 Mirror Universe Swaps Life Totals First Printing: Legends A few cards in the game allow players to exchange their life totals or redistribute life points, and the Reserved List artifact Mirror Universe does just that
Not only are you flush with amazing options for single use card draw spells, but the continuous effects and engines are almost without equals (except maybe in green)