Some decks can be built around the cascade mechanic, as there are ways like Yidris, Maelstrom Wielder to give expensive spells (like the ones with landcycling) cascade
You play it, then you sacrifice the card, then your opponent "gets you target drink"
(I was briefly running Haunted CloakHaunted Cloak before I realized that Ragnaraok already has all three keywords that the Cloak grants.) We'll take some flying from Cliffhaven KitesailCliffhaven Kitesail, some double strike from Brass KnucklesBrass Knuckles, and some shroud from Whispersilk CloakWhispersilk Cloak
But you can use it to, say, rearrange the power distribution of your team to destroy your opponents blocks, ensure that your Sword of Whatever and Stuff is equipped to an unblocked creature, and even use it defensively to make a meager blocker much stronger after you attacked with the creatures holding all your buffs
For example, Chatterfang, Squirrel General sacrifices Squirrel tokens to help you remove opponents' creatures