Entropy

Casting this spell places an aura of chaos on the target. An unwilling target may make a Charisma saving throw to resist the effects of this spell. While under the effects of this spell, the target rolls twice as many d20s when they make a roll. The die that they use for the final roll is determined in a random fashion (such as assigning one die as "heads" and the other "tails"). When rolling with advantage or disadvantage, the target still rolls twice as many, but instead uses the second-highest or the second-lowest rolling dice (if a 3, 12, 8, and 19 were rolled with advantage, the result is 12).