GRealm/Rocketmaul

The Rocketmaul is a unique hardmode hammer. It can be 'charged' by holding the attack button. At full charge, it deals 100 damage. The Rocketmaul has four charging states:
 * 1) 40 damage with 18 use speed*
 * 2) 60 damage with 15 use speed*
 * 3) 80 damage with 12 use speed*
 * 4) 100 damage with 9 use speed*
 * Use speed means how fast the hammer will swing.