You can use any weapon you summon with your Pact of the Blade feature as a spellcasting focus for your warlock spells.
Can a magic item be a spellcasting focus?
There’s no mention of using any category of magic items as a spellcasting focus. Jeremy Crawford has, however, stated that all wands do indeed have this property, even though it is not explicitly spelled out anywhere in the rules.
What can be used as a spellcasting focus?
An arcane focus is a special item— an orb, a crystal, a rod, a specially constructed staff, a wand-like length of wood, or some similar item— designed to channel the power of arcane spells. A sorcerer, warlock, or wizard can use such an item as a spellcasting focus, as described in chapter 10.
Can a weapon be an arcane focus?
Can a weapon be an arcane focus? Arcane foci take many forms, but an arcane foci is not a weapon – but a weapon can be used as a spellcasting focus. Spellcasting foci are used in place of Material components.
Do you need a focus to cast a spell?
This is required to cast the spell even with a spellcasting focus. The PHB gives a few suggestions but does not include an Arcane Focus 5E list. That said, we have provided some suggestions below. In general, these items should not be weapons, shields, or armor. However, this is ultimately up to your DM.
Can you use an opportunity attack to cast a spell?
You can’t if the spell attack is created by casting a spell. When a creature triggers an opportunity attack from you, you can use your reaction to make a melee attack against it. The opportunity attack doesn’t suddenly give you the ability to cast a spell, such as shocking grasp. Each spell has a casting time.
Do you need diamond dust to cast a spell?
These are still necessary even when using a spellcasting focus. For example, Greater Restoration (Listed in our Top 10 Artificer Spells) requires 100 gp worth of diamond dust. This is required to cast the spell even with a spellcasting focus.
When do you need to handle the material component of a spell?
If a spell has a material component, you need to handle that component when you cast the spell (see page 203 in the Player’s Handbook). The same rule applies if you’re using a spellcasting focus as the material component.
