| Name | Thor Cut |
| Type | Skill |
| Level Requirements | Sword 23, Fire 17, Wind 17 |
| SP Cost | 40 |
| Power (STR%) | 450 |
| Execute Time | 120 |
| Effect | None |
| Element | 
|
| Target | Single |
| Critical Chance | 80 |
| IP Knockback | 9000 |
| Experience Gain | 50 |
Thor Cut (雷鳴剣) is a skill that Justin learns after extensively using the sword, as well as both fire and wind magic.
Thor Cut is lightning elemental, therefore dealing additional damage to those who are weak to either fire or wind. Thor Cut is the most powerful of Justin's elemental skills and is capable of dealing immense amounts of damage, while also having a very high chance to critically hit.
Characters who learn this ability:
Changes in ReDux
Differences
| SP Cost | 50 |
| Power (STR%) | 390 |
| Execute Time | 60 |
| Critical Chance | 40% |
| IP Knockback | 2500 |
| Experience Gain | 20 |
In Grandia ReDux, Thor Cut, much like Ice Slash or Lotus Cut, has a faster execute time at lower levels, at a cost of less damage. It's critical hit chance and IP knockback are also reduced, therefore being solely useful for dealing damage.
Dealing damage is still the one aspect it's great for. Against an enemy with low magic resistances, Thor Cut is one of the most powerful abilities in the game, if not the most powerful in certain circumstances.