Whenever the bearer successfully casts or dispels a spell, roll a D6 – the Wand of Whimsy gains a charge on a roll of 5+. The Wand of Whimsy grants the bearer a bonus to both Strength and Attacks equal to the number of charges.
Source: Warhammer Fantasy: 8th Edition
Whenever the bearer successfully casts or dispels a spell, roll a D6 – the Wand of Whimsy gains a charge on a roll of 5+. The Wand of Whimsy grants the bearer a bonus to both Strength and Attacks equal to the number of charges.