How do you DM counterspell?

Present your perspective and ask how the DM wants to handle counterspell in the future. Include the fact that many monsters have non-spell abilities that force a saving throw, and that counterspell is triggered when you see a creature casting a spell.

Can you cast a spell and counterspell on the same turn?

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.

Do you need line of sight for counterspell?

Counterspell depends on sight and a clear path to the target That means that an opposing spellcaster must be able to see the intended counterspell target. Additionally, counterspell must follow the general rules that spells must also have a direct path to the target.

Does counterspell work on innate spellcasting?

For you to Counterspell a spell, you must be able to perceive it being cast. If an innate spellcasting feature doesn’t require Verbal or Somatic components, it can’t be perceived and thus can’t be Counterspelled.

Does counterspell use proficiency?

Since the description of counterspell calls for an ability check, not a check involving a particular skill, the proficiency bonus does not apply, per the emphasized portion in the quote above.

When can you use counterspell?

If a creature is casting a spell, you can Counterspell. If a creature is using a magical ability that is not a spell, you cannot Counterspell. The exception would be if the ability specifies that the ability allows or involves the casting of a spell.

Can you use a reaction on your turn?

Your turn is generally comprised of Actions and Bonus Actions, but a specific turn can include a reaction. You can only take Actions and Bonus Actions on your turn within a round. Your Reaction can be taken on your turn or on someone else’s within the round.

Can you counterspell a verbal only spell?

No, you can’t counterspell spells with no components.

Does counterspell work on abilities?

Counterspell can be used to halt the casting of spells, but not other abilities that are technically not ‘spells’. If a creature is using a magical ability that is not a spell, you cannot Counterspell. The exception would be if the ability specifies that the ability allows or involves the casting of a spell.

How do you determine your spellcasting ability?

Your Spellcasting Ability is determined by which base ability your character uses to power their spells. For example, Sorcerers get their spellcasting power from their Charisma, so their Spellcasting Ability is Charisma. Your Spellcasting Ability modifier is a number taken from the ability used to power the spells.

How do you check spellcasting ability?

“For each spell of 4th level or higher on the target, make an ability check using your spellcasting ability. The DC equals 10 + the spell’s level. On a successful check, the spell ends.”