For a finisher with villain flair, Bolass Citadel lets you cast off the top of your library by paying life instead of mana, then sacrifice 10 nonland permanents to drain each opponent for 10, a fittingly dramatic monologue before the win
You choose whether or not to cast the target instant or sorcery card as the reflexive triggered ability resolves
You can only do it once a turn, but its still a big win
Spirits, as a creature type, keep on getting more and more support every year, differentiating and consolidating a lot of sub-archetypes within this kindred strategy
Most notably, perhaps, it represented Magics first block (or one large set with two related smaller sets following it), which dominated the design and play of Magic for over 20 years