In the case of Diablo 2 Resurrected they use Legendary Crests (which can be purchased or earned) to increase the chances of a five-star gem showing up in endgame dungeons. Although it's not exactly traditional in its presentation (most gacha are performed by "rolling" in a limited-time banner) Players are engaged in the same kind of randomness similar to. In many ways this D2R Items, it's...
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