COIL Device
A specialist communications device developed for Umbra Agents to keep in contact with their headquarters while on assignments. COIL stands for Communication Over Infinite Lengths and the name holds up with these devices still able to function on the elemental and outer planes reliably and consitently.
This technology can be worked into any item or trinket, making it incredibly hard for an outsider to detect it's importance or power.
These devices require a numeric access code as a command word to function and some have even been known to be programmed with some kind of violent effect for incorrect command words.
They may be used once a day to cast the sending spell without the planar drawbacks. Additionally those with magical abilities may expend a spell slot to use the device additional times. When the COIL is used in this way, the caster is granted 6 words per spell level instead of 25.
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