Like most other gacha games, Wuthering Waves players must use a semi-randomized summoning to obtain new characters. In WuWa, this system is called a Convene, and it has a built-in pity system to help you get what you want from your summons.
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When you purchase a summon with Lustrous Tide in Wuthering Waves, you can use it to get a random character, item, or weapon in the game. In these types of randomized games, many have something called a pity system, which means that the chance of getting the best possible character or item in a gacha pull is not 100% random. Wuthering Waves has a pity system to prevent players from getting too unlucky.
It is not 100% certain that characters called Resonators in WuWa are the ones you want after 80 draws. You are only certain of one of the possible five-star characters after 80 Convenes.
For example, if you get a five-star character from the Prevail the Last Night banner, there's only a 50% chance that it's Jiyan, the header character for that specific banner. It's a lot like Hoyo's Genshin Impact in that way.
