Are vampires weak to radiant damage?

The vampire can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check. Vampire Weaknesses. The vampire takes 20 radiant damage when it starts its turn in sunlight. While in sunlight, it has disadvantage on attack rolls and ability checks.

Can clerics change Cantrips?

Can clerics change their cantrips after a long rest? Nope. When you’re preparing your spells after a long rest, you’re preparing things for which you have spell slots. Cantrips don’t use spell slots.

Do paladins do more damage to undead?

There is no mention of extra damage for fiends and undead so no extra damage is done (beyond the 1d8 extra it does to every creature of course).

Do clerics get advantage against undead?

clerics are the better choice when it comes to lower CR undead mooks, like skeletons and basic zombies. destroy undead and having things like sacred flame always available is just really good for obliterating waves of weak undead enemies.

Can clerics lose their powers?

Yes, just like a Paladin in 5e. But 5e Paladins don’t lose their powers like previous versions because their alignment changes. Instead Paladins have oaths, which they are supposed to adhere to, and their dedication to this (or their deity, if you want to separate them). There are no specific rules for enforcing this.

Do clerics have to be lawful good?

Your cleric would have to be either Neutral Good or Lawful Neutral. But to answer your question, no. A cleric, by no means, has to be lawful good. That would be a paladin, and even then (in 3.5e) there are variants that allow a paladin to be a different alignment.

Why do clerics use maces?

Maces were commonly weapons of lawkeepers in the medieval world. The role of fighting clerics in fantasy relates to that nicely since they are the keepers of religious law. They can heal themselves with miracles, but their lack of dexterity makes them poor at handling advanced weapons.