Conjure Vortex (Weavecraft)
Level: Mage 3
Mana: 15. Long duration. Base Success: 60%.
  Casting this spell opens a conduit to the turbulent para-elemental or quasi-elemental planes, calling forth a vortex with a Challenge Rating of up to five. The creature lasts longer than one summoned with Monster Summoning III, and is typically more powerful, but opening the conduit is draining for the caster, costing her two Fatigue points. The caster also needs to succeed on a Knowledge (Planes) check against DC 10 to open the conduit, or the effect is wasted and the caster suffers 2d6 points of damage from trauma.