Eventually, you find some copies of Nettle Sentinel, which allow you to go infinite in mana, and more copies of Glimpse of Nature, so each Elf you cast is drawing you two, then three, and then four cards instead of just one
A lot of the confusion surrounding Rooms comes from its use of the word door in its rules reminder text
Plus, it takes a bunch of turns of sitting through the "please just kill me" purgatory before your opponent actually wins the game with Jace, the Mind Sculptor
Several years ago, this led us to ask the question, "Are there different types of boosters we could make that would excite a different audience than what our normal Draft Booster is aimed at?" The first booster to come from this line of thinking was the Theme Booster
Though not an Un-set type originally, it certainly has the same vibe as one