The wood of a club or quarterstaff you are holding is imbued with nature's power. For the duration, you can use your spellcasting ability instead of Strength for the attack and damage rolls of melee attacks using that weapon, and the weapon's damage die becomes a d8. The weapon also becomes magical, if it isn't already. The spell ends if you cast it again or if you let go of the weapon.

• At 5th level, you may use this cantrip on any weapon made of wood. Additionally, as an action, you may make a special attack that releases the magical powers imbued into the weapon. Make a melee spell attack against the target. On a hit, the weapon deals an extra 1d8 damage (2d8) and the spell ends.
• At 11th level, the damage of the special attack is increased further by an 1d8 (3d8).
• At 17th level, the damage of the special attack is increased by an additional 1d8 (4d8). When you cast Shillelagh, you may apply it to two weapon you are holding at the same time.