Demand

This spell is very much like the 5th-level wizard spell Sending, allowing a brief contact with a far distant creature, except that the message can also contain a Suggestion, which the subject will do its best to carry out if it fails its saving throw vs. spell, with a -2 penalty. Of course, if the message is impossible or meaningless according to the circumstances that exist for the subject at the time the demand comes, the message is understood but no saving throw is necessary and the suggestion is ineffective.

The caster must be familiar with the creature contacted and must know its name and appearance well. If the creature in question is not in the same plane of existence as the spellcaster, there is a base 5% chance that the demand does not arrive. Local conditions on other planes may worsen this chance considerably at the option of the DM. The demand, if received, will be understood even if the creature has an Intelligence ability score as low as 1 (animal Intelligence). Creatures of demigod status or higher can choose to come or not, as they please.

The demand message to the creature must be 25 words or less, including the suggestion. The creature can also give a short reply immediately.

[Player's Handbook]

School: Evocation, Enchantment/Charm
Level: 8
Rarity: Common

Range: Special
Components: V, S, M
Duration: Special
Casting Time: 1 turn
Area of Effect: 1 creature
Saving Throw: Special

Material Components: a pair of cylinders, each open at one end, connected by a thin piece of copper wire (not consumed) and some small part of the subject creature — a hair, bit of nail, etc. (consumed)