Certain spells have a special tag: Ritual. Such spells can be cast following the normal rules for spellcasting, or the spell can be cast as a ritual. The ritual version of a spell takes 10 minutes longer to cast than normal. It also doesn't expend a spell slot, which means the ritual version of a spell can't be cast at higher level.

To cast a spell as a ritual, the spellcaster must have a feature that grants the ability to do so. The Cleric and the Druid for example have such a feature. Casters must also have the spell prepared or on his or her list of spells known, unless the character's ritual feature specifies otherwise, as the Wizard's does.