Warlock's Call

Warlock Invocation
Greater, 5th
Components: V, S, M/DF
Casting Time: 10 minutes
Range: See text
Target: One creature
Duration: 1 round; see text
Saving Throw: Will, See text
Spell Resistance: No

You contact a particular creature with which you are familiar and send a short message of twenty-five words or less to the subject. The subject recognizes you if it knows you. It can answer in like manner immediately. A creature with an Intelligence score as low as 1 can understand the sending, though the subject’s ability to react is limited as normal by its Intelligence score. Even if the sending is received, the subject is not obligated to act upon it in any manner.
If a creature is unwilling to reply, they may make a will save to deal 1d10pts of damage to you.
If the creature in question is not on the same plane of existence as you are, there is a 5% chance that the sending does not arrive. (Local conditions on other planes may worsen this chance considerably.)

Arcane Material Component
A short piece of fine copper wire.