Remember

Remember is an artifact with the power over memories.

Overview
Remember is a card shaped artifact that possess 2 functions; Reset: erase memories of the target, and Continue; restore a target's memories of previous loops. However, this can only been done once per loop, and it will be locked into that function for the rest of the loop.

Intro Arc
It first appeared as a part of Andy's design, jammed into his head, far before its true nature was revealed.

Unbelievable Arc
The location of Remember was offered as a reward for the successful neutralization of the UMA Winter.

Ragnarok Arc
After Fuuko and Andy finally make it to the Roundtable, Juiz reveals to Fuuko a way to save everyone who was lost; using the artifact Remember to restore the next iteration of Negators' memories. It's then revealed that Remember is the card that is jammed in Andy's head, and was placed there by Juiz herself when Victor decided to kill her because she would never give up on her quest to kill God. As a result of Undead's regenerative properties, Andy was created.

Union Arc
The location of Remember was offered as a reward for the successful capturing of Void.

Negator War Arc
It's location was revealed to be in Bujora, South America, which was in the middle of a war fought between a mercenary group called Horizon Balance, led by Billy, and solders lead by Creed for an ancient super weapon and another artifact called Disc. It is recovered when Disc destroys the island due to a stroke of Unluck.