Mastery of the Battleground

Extend Spell (PH) , Spellcraft 6 ranks, Knowledge (the planes) 2 ranks,

Any time you cast a spell that creates, enhances, or mimics a weapon (such as flame blade, keen edge, or Mordenkainen's sword) or excites hostile emotions (such as rage, heroism, or antipathy), you can spontaneously apply the effect of the Extend Spell metamagic feat to that spell. Doing this has no effect on the spell's level or casting time.

Any time you cast a spell that creates, enhances, or mimics a weapon (such as flame blade, keen edge, or Mordenkainen’s sword) or excites hostile emotions (such as rage, heroism, or antipathy), you can spontaneously apply the effect of the Extend Spell metamagic feat to that spell. Doing this has no effect on the spell’s level or casting time.

You have learned to calculate the precise location of Shavarath at any given time, and to use that knowledge to enhance spells of battle that you cast.