Most Clerical spells don’t need material components, MOST. A lot just require a Divine focus, your holy symbol. Some spells on the other hand do need material components. Hallow needs a LOT of incense, Restoration requires Diamond dust, Raise dead and similar return from dead spells need more diamonds.
Do warlocks need components?
Yes, you are correct. Spells that require a material component can be cast only by handling that component or holding the focus. Material components with a cost or are consumed (or both) are the exception, you need specifically those components.
Do Warlocks have 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.
What do you have to do to cast a spell?
To cast a spell, you must be able to speak (if the spell has a verbal component), gesture (if it has a somatic component), and manipulate the material components or focus (if any). Additionally, you must concentrate to cast a spell. If a spell has multiple versions, you choose which version to use when you cast it.
Can a DM stop a caster from casting a spell?
Obviously, if a spellcasters hands are bound or manacled the DM may decide this is sufficient to prevent spellcasting with somatic components, especially if done by someone familiar with how spells are cast.
Can a spell caster wield a shield without a feat?
Basically the rule requires you don’t wield a weapon or shield without a feat that allows you to. Page 79 under material component. A spell caster must have a hand free to access these components , but it can be the same hand used for the somatic components. So yes those conditions are not useful for distracting a wizard.
How does the power of a spell depend on its caster?
A spell’s power often depends on its caster level, which for most spellcasting characters is equal to her class level in the class she’s using to cast the spell.