Primal Wrath

When you make a melee attack with a weapon affected by Shillelagh, you can take a penalty to the attack roll to channel the old ways. The penalty scales with the target's size: -3 for Medium or smaller, -6 for Large, -9 for Huge, -12 for Gargantuan.

If the attack hits, roots erupt from the ground and seize the target. It is restrained until the end of its next turn.