Boulder Seed (Greater)

This bomb is made of volatile fluids that rapidly expand and harden when exposed to air. A greater boulder seed grants a +3 item bonus to attack rolls and deals 4d4 bludgeoning damage and 4 bludgeoning splash damage. When activated, the bomb fills a 5-foot cube with hardened foam, which creates a boulder as hard as stone (Hardness 10, HP 40) that pushes the primary target of Large size or smaller occupying that space 5 feet away from you. On a critical hit, the target also falls Prone. The splash zone fills with rubble, creating difficult terrain. The "boulder" the bomb creates fails all saving throws and loses 1 Hardness per round, disintegrating into fine powder when the boulder's Hardness is reduced to 0. At that time, the difficult terrain the bomb created also disappears.