Tetsubo of Earth

A 6-foot-long tetsubo formed of earth springs forth from your hands. You wield this weapon with proficiency as if it were a greatclub. Attacks with the tetsubo of earth are regular melee attacks. The tetsubo deals 1d10 points of damage +1 point per two caster levels (maximum +10). The tetsubo is considered a +1 weapon for purposes of overcoming damage reduction.
 

You form a 6-foot-long tetsubo made from earth in your hands. This magic greatclub lasts until the spell ends. It deals 2d8 Bludgeoning damage on a hit, and counts as a +1 weapon, gaining the normal bonuses to attack and damage rolls.   If you drop the weapon, it dissolves into non-magical earth. Thereafter, while the spell persists, you can use a bonus action to cause the tetsubo to reform in your hand, causing the earth to dissolve.   Special: Ryushin Clerics ignore the Rare tag of this spell.   At Higher Levels. When you cast this spell using a higher level spell slot, increase the damage by 1d8 for every two slot levels above its base level.