Phantom Powered Microphones. If you've ever done anything on the professional side of audio, you've probably run into a condenser microphone. These require power to work. Sometimes, that's a battery you put into the mic. Sometimes it's a separate dedicated power supply with a special multi-pin cable. But most often these microphones use phantom power. This is power delivered by a mixer or console, which uses the same cable that the audio comes back on.
invocation. 1  the act of invoking or calling upon a deity, spirit, etc., for aid, protection, inspiration, or the like; supplication. 2  any petitioning or supplication for help or aid. 3  a form of prayer invoking God's presence, especially one said at the beginning of a religious service or public ceremony.
Invoking the Gods is a quest that becomes available at level 11 and which serves to introduce Invocation. During past beta weekends, there were several ways to start this quest, once you had reached level 7: Speak directly to Felicia. Accept the quest through a task in the level up menu (Strg+P)