As an action, Saku presents his holy symbol and speaks a prayer. Each undead within 30 feet that can see or hear him must make a Wisdom saving throw. On a failure, the creature is turned for 1 minute or until it takes damage.

Saku calls on a brief divine utterance to guide an ally's next task.

Saku hurls a mote of divine fire at a creature within 60 feet. The target must succeed on a Dexterity saving throw or take 1d8 radiant damage.

Saku fills his voice with unsettling authority, creating a harmless supernatural sign or causing flames, wind, or sound to react to his presence.

Saku can cast cleric spells using Wisdom as his spellcasting ability. He prepares four cleric spells after each long rest, in addition to his Knowledge Domain spells, and knows the cleric cantrips listed in his spell section.

Saku is proficient with two languages of his choice, Celestial and Undercommon, and with two skills of his choice, Nature and Religion. His proficiency bonus is doubled for ability checks using those two skills.

Saku gains the Knowledge Domain feature, which grants the domain spells command and identify. These spells are always prepared and do not count against his number of prepared cleric spells.

Saku can use a holy symbol as a spellcasting focus for his cleric spells.

Saku can use Channel Divinity once between rests. He can use it to Turn Undead, forcing each undead that can see or hear him within 30 feet to make a Wisdom saving throw or flee for 1 minute, and he can use it for Knowledge of the Ages, gaining proficiency with one chosen skill or tool for 10 minutes.

When Saku does not know a piece of information, he usually knows where and from whom it can be obtained. He can often identify libraries, archives, scholars, sages, cults, and other sources of obscure knowledge, and can secure access to information through patient research and careful explanation.