|A remarkable automaton from c. 1560!|
See it in action here.
In a prior age, Saint Eustain worked his miracles in a most unusual fashion. He would craft a small mechanical toy of a singing monk, a trundling figure with a music box contained within, and imbue it with holy might. Many have been lost to time, but all accounts regarding them have called them both delightful and a great aid in battling the forces of darkness. Most beings of Chaos cannot even touch one (they must save or suffer 1d8 damage), let alone attempt to destroy it. This has helped preserve them in unlikely places such as dungeons, corrupted churches, etc. They can usually be found covered up or hidden away from dungeon denizen eyes.
Once per day, a musical monk can be activated and it will slowly move and "sing" its particular song for ten minutes. Here are 1d4 example types of musical monk:
1. The Lord is My Shepherd: When faced with any branching paths, which button to press, etc. it will move towards the most optimal (and if applicable moral) option for the party to take.
2. Sumer is Icumen in: Fills the room it occupies with a light as powerful as sunlight. It does not affect the eyesight of the Lawful and Neutral but temporarily blinds the Chaotic.
3. Abide with Me: Provides a 15' radius of protection (+2 to AC and +2 to Saves). It also allows any character who chants with it and holds a holy symbol aloft to turn undead. Lawful clerics receive a +1/+3 bonus on a 2d6/1d20 turn undead roll.
4. Be Still for the Presence of the Lord: All Chaotic creatures in a 15' radius must save versus standing still in awe (treat as paralysis). Those rapt may not be harmed by the monk's user and/or their party. If a cleric then successfully turns any of these stunned beings, beings of pure evil will flee or be dispelled as normal but Chaotic followers will see the light and convert to Law.
If this is seen as too powerful by the GM, they may allow an additional save versus conversion.
Also, since we're on the topic, Elvis' rendition of How Great Thou Art is fantastic.