Duel Decks: Cabbage vs. Lettuce
It's a Black Lotus spindown, which was sold just on its own.
As GoldenSandslash15 says. The spindown dice with the Black Lotus design were sold in a 5-pack and are the only design that didn't come in some other product, e.g. Fat Pack, Prerelease Kit.
Here they are in the package, on ebay.
Back in the day, these came in fat packs, and I'm talking way back in the day. They originally didn't even come with card boxes. I remember getting a fat pack as early as Prophecy that came with 6 boosters, a novel for the set, a foil basic land, a pro player trading card, and a Lotus spin down.
They came in the Beatdown Box Set.
Beatdown Box Set.
I have two of those that I got from the OG Ravnica fat pack.