Master Rune of Wrath

Evocation [force]
Tier: 3
Components: Rune
Casting Time: 1 minute
Range: Touch
Target: Melee bludgeoning weapon bearing the rune
Duration: 1 round or until discharged
Saving Throw: Reflex partial; see text
Your hammer strikes the ground with impossible force, and shards of stone explode all around you.

When wakened, this rune empowers your weapon with raw explosive force. Your next attack against deals +3d6 damage.

If you strike solid ground, the force breaks and shatters the surface. You deal 3d6 damage to all creatures (except you) within 10', and each creature that takes damage falls prone unless they succeed on a Reflex save.

This bonus is lost if it is not used within the duration of the spell. 

Runic Power:
The damage increases to 6d6.