There isn't a ready-made crystal PvP config to download. Community configs aren't files you download from a website. You load them in-game, from chat:
Type .config list to see every config that exists.
Type .config load <name> to load one from that list.
None of them is made for crystal PvP. For that, turn on CrystalAura and set it up yourself: https://liquidbounce.net/docs/modules/combat/crystalaura
The configs page covers the rest: https://liquidbounce.net/docs/usage/configs
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