Stormy Eidolon: A storm caller must select the resistance (electricity) or immunity (electricity) evolution for his eidolon. If the eidolon has neither of these evolutions, it becomes nauseated until it regains one of them. An unchained summoner with this archetype must select an eidolon subtype that gains resistance or immunity to electricity at 1st level, such as the elemental eidolon or genie eidolon.
This ability alters eidolon.
Summon Storm’s Fury (Sp)
A storm caller can summon creatures infused with the power of the storm to help him. This functions as the summoner’s summon monster I–IX abilities, except the storm caller can summon only the following creatures at the indicated spell levels: I—eagle; II—small air elemental, small lightning elemental; III—dire bat; IV—medium air elemental, medium lightning elemental, pteranodon; V—large air elemental, large lightning elemental; VI—huge air elemental, huge lightning elemental; VII—roc; VIII—elder air elemental, elder lightning elemental; IX—advanced elder air elemental, advanced elder lightning elemental. Any creatures summoned with this ability gain immunity to electricity.
Each bolt of lightning deals 1d6 points of electricity damage. This damage increases by 1d6 at 3rd level and every 2 levels thereafter, to a maximum of 10d6 at 19th level. The prevailing weather has no effect on the damage of the lightning bolts. The Reflex save DC is equal to 10 + half the storm caller’s summoner level + his Charisma modifier. If the storm caller uses this ability again before he has used all of his available bolts of lightning (to summon another magical storm, to summon a monster, or to use the gate spell), any unused bolts are expended with no effect.
The storm caller adds call lightning to his summoner spell list as a 3rd-level spell and call lightning storm to his summoner spell list as a 5th-level spell, but he does not automatically add them to his list of spells known.
Electrical Polarity (Su)
At 4th level, a storm caller and his eidolon can temporarily form an electrical current between them. The storm caller can expend a use of his summon storm’s fury ability as a standard action to create an instantaneous line of lightning between him and his eidolon, provided that the eidolon is within 60 feet of him.
The lightning arc deals the same amount of damage to all creatures in the line and has the same save DC as a bolt of lightning from the summon storm’s fury ability (unlike call lightning, this damage is dealt only once). The storm caller and his eidolon are not affected by this lightning.
This ability replaces shield ally and greater shield ally.
Storm’s Wings (Su)
At 6th level, a storm caller can borrow some of his eidolon’s elemental might. He can gain the flight evolution as though he were using the summoner’s aspect ability, deducting 2 evolution points from the eidolon’s evolution pool. If he does so, his eidolon is unable to take the flight evolution as long as the storm caller has that evolution.
At 8th level, the storm caller’s eidolon can have the flight evolution even if the storm caller has that evolution.
At 10th level, the storm caller automatically gains the flight evolution without reducing the number of evolution points available to the eidolon. He can use the aspect ability (and at 18th level, the greater aspect ability) to gain additional evolutions.
This ability replaces maker’s call and transposition.
Pathfinder Player Companion: Elemental Master’s Handbook © 2017, Paizo Inc.; Authors: John Compton, Eleanor Ferron, Mikko Kallio, Jason Keeley, Isabelle Lee, and Christopher Wasko.