Several potential additions for the clerical spell school:

• Bless: this could either be a low-level spell that works like it does in D&D where it gives you a to-hit and damage bonus, or it could be a high-level spell that blesses an item. Possibly it could bless items when cast at Skilled or above.
• Sanctuary: a medium-level spell that effectively makes monsters treat the 3x3 area around you like a coaligned temple for a limited time, unless you take a hostile action which ends the spell.
• Command: Drop: forces a monster to drop its weapon.
• Inflict Wounds: medium-level spell that deals damage while being in the clerical school. Damage should probably scale with skill.
• Hold Person: paralyzes a monster (or more strictly, a humanoid); fits right in since enemy priests can already cast this.
• Silence: Temporarily stops a monster from reading a scroll or casting a spell. Not specified if this should be a debuff or create a region of silence.
• Dispel Magic: Removes magical effects from a monster or multiple monsters. May be of limited use unless added to a variant where monster magic buffs are significant.
• Freedom of Movement: Grants temporary intrinsic free action, allowing you to free up a ring slot.

Free action should prevent monsters from grabbing or sticking to you.

Wearing a shield of mobility should confer SLASH-style free action: rather than paralysis resistance, you instead have a decent chance of freeing yourself if you get grabbed by a monster or attacked by a mind flayer.

Ice devils should have a slowing attack, like they do in D&D. Most likely, this should be like a lichen’s temporary slow in EvilHack, rather than a permanent speed-loss like a shade or skeleton has. Free action could reduce or negate this.

Randomize the set of “critical” extrinsics and the base items that provide them in each game. I.e. instead of every game having a cloak of magic resistance, ring of free action, and amulet of reflection, the game could have a ring of reflection, a cloak of free action and an amulet of magic resistance.

A potion or spell of free action, which gives it as a temporary intrinsic, and exists solely for the rare case where you are in a demonic or vampiric form and the ring of free action is silver.

Free action enables you to move on turns you would normally miss due to being turned to stone, effectively giving you more actions to save yourself.

An artifact T-shirt that provides free action when worn, but only if no armor is worn over it.