| Icon | Name | TM Level | Type | Learn | Mastery | Mastery Item | Prerequisite |
 |
Double Slam | 10 | On/Off | 3 | 3 | x2 Hula Octopus Card | Demolition Lv.1 |
| Power-attack attacking one target. | |||||||
| Formula: | Normal Attack Damage × magnification |
| Level | MP | Cooldown | Attack Percent (A) | Magnification | ||
| 1 | 30 | 4 seconds | 130% | 1.3 | ||
| 2 | 34 | 145% | 1.45 | |||
| 3 | 38 | 160% | 1.6 | |||
| 4 | 42 | 175% | 1.75 | |||
| 5 | 46 | 190% | 1.9 | |||
| 6 | 50 | 205% | 2.05 | |||
| 7 | 54 | 220% | 2.2 | |||
| 8 | 58 | 235% | 2.35 | |||
| 9 | 62 | 250% | 2.5 | |||
| 10 | 66 | 265% | 2.65 | |||
| Master | 70 | 300% | 3.0 | |||
| Notes: | After attack put the weight on the hammer, put the additional blow using the recoil. | |||||