The Counterspell caster will only know that you are casting a spell, and they may waste a Counterspell on your cantrip. If you successfully bait a Counterspell on a cantrip, and you’re a Sorcerer, you can follow up with ‘Quickened Spell’ Metamagic to cast a spell with a spell slot as a bonus action.
Can you counterspell a bonus action spell?
You are correct, by the rules on PH 202, you cannot use Counterspell on the same turn that you cast a bonus action spell.
Can you cast counterspell as an action?
You can do it. Because of the only somatic component of Counterspell. Since counterspell is a reaction, the caster (the wizard in your case) can cast another spell (fireball) just after counterspell.
Is spellcasting a bonus action?
You can cast a spell as a Bonus Action if it says it takes a Bonus Action to cast. There is also a less-clear rule that says 1 spell per turn, but a spell and a cantrip are OK. Only if a class feature gives them a bonus action that can be used to cast spells.
When can I use counterspell?
You attempt to interrupt a creature in the process of Casting a Spell. If the creature is Casting a Spell of 3rd Level or lower, its spell fails and has no Effect. If it is Casting a Spell of 4th Level or higher, make an ability check using your Spellcasting Ability.
Can you counterspell a legendary action?
The lich’s legendary action is described as: Only one legendary action option can be used at a time and only at the end of another creature’s turn. Counterspell is listed as one of the spells of the archlich that can be taken “at will.”
Can you subtle spell in silence?
You might not even need Subtle Metamagic As long as you are outside the Silence when you cast the spell, but the object itself is inside, the Silence spell will absorb the loud noise. Knock has a 60ft range, so it should be perfectly doable to stand outside the Silence field and cast the spell into it.
