They define archetypes, warp deck-building rules, and in many cases, win games outright
I also love it in political decks where you are playing havoc with stuff or in Pollow Fort to encourage your foes to swing at each other behind Ghostly Prison effects, or with goad and other forced combat Commanders like Firkraag
Beyond that, Japanese exclusive prints, trophy and tournament cards, certain gold stars, and high-grade vintage holographics can all carry significant value
Starter tip: Begin with ~40 % lands (24 in a 60card deck) and adjust after a few test hands
Checking both players cemeteries is also an excellent way to plan ahead and allows you to predict what your opponent will resurrect
I love this card because it is a wacky and cheap way to steal someones creaturewithout really stealing them