Invader Jacob

Original stuff found in this fic

CONTAINS POTENTIAL SPOILERS OF PROBABLE FUTURE EVENTS. READ AT YOUR OWN RISK

Time defying crystals and gems - these powerful items are found scarcely in Tetis. The only way to truly gain these are by reviving fallen friends and foes. They can be revived within a 30 minute time frame. Depending on how quick you revive them, the more time defying crystals you gain. Its color being gray and being translucent , it is mistaken as another mineral and discarded by the inhabitants of Tetis.

Weapons and use case for the time defying crystals - being able to find its use by Jacob by accident, he experimented the extent of its power. Here is his findings:

- They can be used as a speeding agent, being able to age anything forward by using a complex machine/contraption and/or by using special magic that is tailored made to use the crystals. After the crystal was used, it turned to anywhere between sky to dark blue.

- The used crystals can still be used for another purpose, reversing time and if possible, stopping it completely. The way time reversal works is the same process for forwarding time, stopping time in an area requires extended preparation. Somehow finding a way to stop time and not yourself be affected is the same as finding the shadow of an open flame, impossible. The only way it could happen is through obscure but powerful magic techniques that, as of time of writing, is currently impossible and improbable.

- The affected object or living entity would experience progression or regression physically but not mentally. Quite useful for farming, de-aging, wineries, machine progression and much much more.

- After teaming up with FP, they somehow made it possible for Jacob to gain access of his old account of Guardian Tales by using spacial magic and a whole lot of time defied crystals.

- After a freak accident, Jacob vowed to not distribute the knowledge, the usage and the harmful use of the crystals

- Medicinal use is of course a choice but is not recommended for normal use. Only usable when most options are depleted

- Can be used as grenades that would be banned by the Geneva Convention

Weaponry and Fighting Styles - after harnessing the delicate mechanism of gem switching within a tight environment, with enough crystals at the person, anyone can be Traced after Jacob recreated the model from Overwatch.

That said, time related fighting would be cool. A fist that moves impossibly fast to punch an opponent's face would be hilarous. Mimicking a move from UI Goku from Dragon Ball Z Fighterz, The device can also release a pulse of slow down time esence and make everything that it touches to be fasater or slower depending on the user's feeling. 

Transportation - again, self explanatory, better vehicles, vehicles from other games and mixing and matching combis with the time crystals leads Jacob and co. with quite a few options.

Training - A mix of virtual reality and future gaming tech leads to a gaming simulation that stimulates the user's brain to be more attentive, increase reaction speed, and, depending on the equipment on hand, increase muscle growth and proficiency of using weapons and vehicles under the guise of controllers. Martial arts, training dummies, weights, you get the gist.