|Well, congrats. You discovered it. You get to name it.|
Although this article is based on canonical information, the actual name of this subject is conjectural.
The memory reliving spell forces targets to relive their most painful memories, completely immobilizing them in the process. It was so effective that the spell only broke when the caster was distracted because of pain. Unlike many spells, this did not require any ingredients or incantations from the caster. However, it could be because of the aptitude of Spencer with magic. The spell turns the targets' eyes white and their pupils' light blue.