Is Silvery Barbs Good?
Overall Rating: Sky Blue. This means that silvery barbs is an amazing spell. If you do not take this spell your character would not be optimized.
Overall Notes: Probably one of the more broken spells in 5th Edition. Silvery barbs allows you to automatically grant disadvantage to any creature when they succeed on an attack roll, ability check, or saving throw. This may seem innocent enough, but when used in higher-level play and when noted that there is no saving throw to resist the effect, it can make short work of a legendary monster's Legendary Resistances when saving against powerful spell effects. Essentially, silvery barbs acts like a second casting of a high-level spell, for the low price of a 1st-level spell slot and a reaction. Yes, using your reaction means you won't be able to counterspell. But in most circumstances, especially when fighting a non-caster legendary monster, it can begin to trivialize encounters. The secondary effect, wherein you grant another creature advantage on the next attack roll, ability check, or saving throw is simply icing on top of the extremely powerful cake.