War Wizard's Expertise is an arcane class feat. It was introduced in Dragon Magazine article Tools of Two Trades, for adventurers specializing in two weapon or implement groups.[Dr402] This expertise feat gives a +1 feat bonus to attack rolls of arcane powers and basic attacks that are made with a light blade or heavy blade. The bonus increases to +2 at 11th level and +3 at 21st level. When using an arcane attack power with a light blade or heavy blade, attack rolls on allies take a -5 penalty.