Pernicious Magic
( Forgotten Realms Campaign Setting, p. 37)[Metamagic]
You can use the Shadow Weave to make your spells harder for Weave users to counter. Any creature using a spell, spell-like ability, or magic item without the Shadow Weave Magic feat is considered to be a Weave user.
Prerequisite
Shadow Weave Magic (FRCS) ,
Benefit
Your spells resist counterspell attempts by Weave users. When a Weave caster tries to counterspell a spell you are casting, he must make a level check (DC 11 + your caster level) to succeed at the counterspell. This benefit does not extend to spells you cast from the school of Evocation or Transmutation, nor to opponents using dispel magic to counterspell (see Tenacious Magic, later in this section). From now on your ability to counterspell Weave magic is impaired When you attempt to counter a Weave spell, you must make a level check with a DC of 9 + your opponent's caster level to succeed This penalty does not extend to Enchantment, Illusion, or Necromancy effects. (You counterspell them normally.) You may attempt counterspells with dispel magic normally.