Anti-Summoning Shield
School: abjuration
Level: Arcanist 2, Wizard 2, Sorcerer 2, Bard 2, Skald 2, Summoner 2, Unsummoner 2, Inquisitor 3
Casting Time: standard action
Components: V
Range: medium (100 feet + 10 feet/level)
Area: 50-foot-radius
Duration: 1 minute/level
Saving Throw: Will negates
Spell Resistance: yes
Source: Demon Hunter's Handbook
Description
Within the area of effect, this spell impedes the use of spells of the summoning subschool and other effects that summon creatures. Any such spells, spell-like abilities, or similar summoning effects used within the area have a percent chance of failure equals 5% x your caster level, to a maximum 75% chance of failure. If the summoning effect already has a percent chance of failure (as is often the case with the summon spell-like ability of outsiders), these percentages stack. This spell does not affect summoners attempting to summon their eidolon, but it does affect summoners casting other summoning spells.