private void RegisterCurse(string spell, string curse)
{
// 5+ mobs near the best target.
RegisterCurse(spell, curse, ret => BestTarget.IsCursable && (BestTarget.Rarity >= Rarity.Rare || NumberOfMobsNear(BestTarget, 10, 4)));
// If you want to curse everything.
//RegisterCurse(spell, curse, ret => BestTarget.IsCursable);
}