Oracle's Piety

Most oracles devote themselves to the service of a single god and learn to ignore the voices of all others. Your oracular abilities improve as your piety score increases. Instead of gaining the piety benefits associated with any god, you gain the following traits when you reach the specified piety score. Wisdom is your spellcasting ability for any spell that you cast through these traits.

• Augur (Piety 3+). You can cast augury as a ritual. Once you do so, you can’t cast it in this way again until you finish a long rest.
• Seer (Piety 10+) You can cast divination as a ritual. Once you do so, you can’t cast it in this way again until you finish a long rest.
• Sibyl (Piety 25+). You can cast commune as a ritual. Once you do so, you can’t cast it in this way again until you finish a long rest. Additionally, you can’t be surprised, provided you aren’t incapacitated.