Summoner Conduit

Necromancy
Level: Artificer * 4, Cleric */Oracle * 4, Sorcerer */Wizard * 5, Summoner * 4, Warlock * 5
Components: V, S, M (two flies)
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one summoned creature or eidolon
Duration: 1 minute/level
Saving Throw: Will negates
Spell Resistance: yes
  You exploit the Invisible, mystic connection between the target creature and its summoner to harm that summoner. Whenever the target's summoned creature is the target of a spell that deals damage, the target's summoner is also considered to be a target of that spell. Such a summoner gains his normal defenses against the spell, such as a saving throw and spell resistance, and cannot be affected if he is on another plane of existence.