From publisher blurb:
Tap into the Arcane!
Magic-users are more than just fragile spell-slingers! With White Box Arcana you'll bring new options to your arcane apprentinces and exceptional archmages! Inside this 32-page supplement you'll find all kinds of simple, yet exciting resources to your magic-user, including:
Latent Spellcasters: Now other classes can have a touch of the arcane!
Arcane Duels: Complete rules for wizard duels to decide who is master of the magic arts!
Stronghold Construction: Build a laboratory, design a library, or head-up a magical academy!
New Spells: Everything rom binding familiars and creating magic items, to walking the planes of existence and breathing dragon fire! Over 30 new spells!
New Magic Items: Over 25 new magic items to add to your campaign!