You summon a Demonic Circle at your feet, lasting 6 min. You can only have one Demonic Circle active at a time.
Demonic Circle: Summon is the first part of the level 80 warlock spell Demonic Circle. The spell places a summoning circle on the ground for six minutes, allowing the warlock to use Demonic Circle: Teleport in order to instantly teleport themselves to the point of the summoning circle (so long as the warlock is within 40 yards of the summoning circle). This spell has a 30 second cooldown and requires 15% of your base mana.
Edit
