Vagra II was the formerly inhabited second planet of the Vagra star system, located in the Zed Lapis sector of the Alpha Quagrant.

The planet had no signs of lifeforms, virtually no vegetation, and the minimum atmosphere requirements for humanoids. A "race of Titans" once brought out from within themselves all evil and negative attributes that had bound them to destructiveness. As a by-product of this procedure, the unwanted substance spread and merged into a dank and vile second skin, Armus, a "skin of evil". The race rejected this malevolent sentient substance and abandoned it on Vagra II.

In 2364, Armus threatened the crew of a USS Enterprise-D shuttlecraft that had crash landed on the surface. It also killed Lieutenant Natasha Yar, who was part of the away team assigned to recover them. After the crew of the Enterprise-D escaped, they destroyed the shuttle wreckage to trap Armus on the planet. Vagra II was subsequently placed under quarantine.