DamageMultiEffect ignores the amount provided and relies on the TargetAnyTargetAmount it needs.

This is very unintuitive and should be remedied, either by removing the Amount in DamageMultiEffect or firing a WrongCodeUsage exception if the sum of the multiTarget's amounts is a mismatch with the amount provided in DamageMultiEffect.

Start by locating DamageMultiEffect and the TargetAnyTargetAmount it currently relies on. Determine whether the intended resolution is to remove Amount or to raise WrongCodeUsage when the multiTarget amounts do not match it. Done means the chosen behavior is implemented and the mismatch case is verified.

Written by the indexing model from the issue text.