The versatility it offers of searching up any number of creatures with a total MV of 6 or less makes it shine as one of the best toolbox-openers in the game, grabbing you that Endurance and Reclamation Sage at the same time to permanently shuffle away that damn Sphere of Safety
Any target players that are no longer legal targets by the time Officious Interrogation resolves won't have their creatures counted when determining how many tokens you create
For example, Nicol Bolas the Ravager will exile himself and return to the battlefield transformed into Nicol Bolas, the Arisen by paying four generic, one blue, one black, and one red mana
Enchantments There is a pretty sizeable pool of one black mana, when this creature dies, it doesnt die/returns to the field, both on enchantments and on instants, so Im not going to talk about those right now