Eldritch Portal is a projectile spell that spawns a portal at melee range from which tentacles reach out to strike anyone nearby, including you, for high damage.
Tips
Usage with a Trigger is recommended, as you may otherwise be hit. Since the tentacles are considered melee attacks, Melee Immunity will completely negate the tentacle's damage, making the spell safe at close proximity.
Effective in places with many bodies as the tentacles don't seem to be blocked by them.
The tentacles do not benefit from modifiers, but this also means they don't take a damage penalty from Piercing Shot or Divide By.