Type: General
Source: Monster Manual V
Through intense training and impeccable timing, you and your allies learn to augment each other's magical attacks when you focus your efforts on a single target.
Prerequisite: Spellcraft 6 ranks, arcane caster level 3rd.
Benefit: Each time you cast a spell that requires the target to make a saving throw, that target gains a Battle Magic Tactics token after the spell resolves. A creature gains a token whether the save succeeds or fails, but a creature that avoids a spell through spell resistance does not gain a token. Each Battle Magic Tactics token imposes a cumulative -1 penalty on saving throws against the spells of spellcasters that have this feat. At the end of each round, all Battle Magic Tactic tokens disappear.