Overlord Cycle Each 'biome' of Duskmourn has an Overlord, an Avatar Horror with Impending, which enters as an enchantment, and doesn't become a creature until its last time counter is removed
If your collection is full of older cards, then there is some serious potential for money as older sets have a variety of valuable cards and some sets are valuable simply due to their age
Hans, Run!" You don't want to be rules lawyered for messing up the names in a game of Unhinged Sealed or your friends may call you out for misfiring with "Ach
While there is a lot of variation in average sentiment between nearby sets (and certainly a lot of variation in flavor text sentiment within each set), there is a slight upward trend over the course of the game's history
Additionally, Thought Vessel also has a higher risk of being removed with an Artifact removal than Reliquary Tower, since not removing lands is an unspoken rule in Magic: The Gathering
Even if you open Ancient Tomb #46 (the second cheapest), you still opened one of the most valuable cards in the bonus sheet (and set in general)