SolVanderlyn
Thanos acquires the fully powered Infinity Gauntlet in The Avengers: Infinity War, but loses when all the superheroes team up together to stop him.
Brook's ice powers don't seem to have an in-universe explanation outside of the fact that they're associated with him being able to harness "the chill of the underworld". Realistically, he was probably given those powers to give him some actual offensive utility while still using his sword, as he's clearly outclassed by Zoro in raw strength.