If the timing is specified in the ability, use that timing. Otherwise, reactions occur after the trigger. This entire thing is a matter of specific over general. In 5e, when a specific rule and a general rule conflict, the specific rule wins.
Can you cast a spell as a reaction?
Can you also cast a reaction spell on your turn? You sure can! Here’s a common way for it to happen: Cornelius the wizard is casting fireball on his turn, and his foe casts counterspell on him.
Can you reaction while surprised?
If you’re surprised, you can’t move or take an action on your first turn of the combat, and you can’t take a reaction until that turn ends.
Do reactions use spell slots?
A spell, always consumes a spell slot unless you have a specific feature that does not. If you use a reaction to cast a spell of any kind, weather it is a held action of a prepared spell in case X happens, or like you have said using Shield.
Can you cast a reaction spell during your turn?
The restriction is on casting another spell during the same turn (not round, turn) as a bonus action spell. That rule applies to actions and bonus actions, not reactions. If you cast a bonus action spell then you can’t cast a reaction spell during your turn, as it isn’t a cantrip with a casting time of one action.
Do you have to pre-cast a shield spell?
In the case of shield, that trigger is “when you are hit by an attack or targeted by the magic missile spell”. When that triggers occurs, you can cast the spell and spend the spell slot at that time to do it. You do not need to Ready a reaction spell in order to use it in this way. It is simply the way reaction spells work.
When to use a reaction spell in RuneScape?
When that triggers occurs, you can cast the spell and spend the spell slot at that time to do it. You do not need to Ready a reaction spell in order to use it in this way.
Can a bonus action spell be used during your turn?
No rules prevent casting a Reaction spell and an Action spell. If you cast a Bonus Action spell, you can’t cast a Reaction spell during your turn (uncommon but possible), but you’re free to cast one once your turn is over. Trying to think of a situation of using your reaction on your own turn.
