Silence is not a one-mana counterspell that also forbids your opponent from casting other spells this turn.
Can you counter decree of silence?
When you cycle Decree of Silence, you may counter target spell.
Can you dispel silence?
Silence is only a 2nd level spell and so, like all spells of 3rd level or lower, it is dispelled automatically. There is nothing special about a monk’s Shadow Arts. They “duplicate the effect of a spell”, so they can be dispelled in the same way.
Can a counterspell be used on a subtle spell?
Yes. It’s been established in the Sage Advice Compendium that (emphasis mine): If a spell that’s altered by Subtle Spell has no material component, then it’s impossible for anyone to perceive the spell being cast. So, since you can’t see the casting, counterspell is of no use.
Can you use your reaction to cast counterspell?
You CAN use your reaction to cast Counterspell, but you will lose the original spell you were casting and the result would be the same. The only difference being that you wasted 2 spell slots instead of one. If you are attempting to cast a spell, let’s call it Fireball, then someone within 60′ of you can use their reaction to cast Counterspell.
Can a NPC counter a silence spell in RuneScape?
They don’t need to know what spell it is, or even have it on their class list to make the counter. Based on this, and what I gather from your context, the short answer is: yes the NPC could have cast counterspell. The NPC doesn’t have to know that a silence spell is being cast. All they need to know is that a spell is being cast at all.
When to use Fireball or counterspell in RuneScape?
If you are attempting to cast a spell, let’s call it Fireball, then someone within 60′ of you can use their reaction to cast Counterspell. The trigger is seeing you “in the process of casting a spell” as spelled out in the description of Counterspell on p.228.
