Clerics start with three cantrips. At level four, they can have four cantrips, and at level ten, they gain access to a fifth cantrip. However, it's important to keep in mind that clerics cannot prepare cantrips. Although they have access to their entire spell list, they do not have access to every cantrip in the book. Similar to all other magic casting classes, once you take a cantrip as a cleric, you cannot change it.