I would think that as soon as she removes it from the resource it would revert to a relic but that is just a guess.

Ruling from the WizKids Rules Team:

"The Rings are Relics, and she could use her effect to be assigned them."

Relic-stealing mayhem aside, what I like about Mallor is how she can fearlessly rely on her 17/CR/SC combination to aggressively base and slam someone for 5 damage with a heavy. Don't forget - she can throw objects from the shadows, giving her an effective 11 (or 13 with a light object) square "reach" with her shadowy teleport to catch an enemy off guard. Her mid-dial is a bit more fragile, but she is VERY hard to put down thanks to the Phasing + Regen maneuver. An opponent pretty much needs to double-tap her with Flurry or some such to put her out. Avoid Flurry opponents, keep your eyes on escape avenues and hope for that 6 on your Regen roll so you can get back to grabbing objects. She can live a LONG time.

She Hulk made a new best friend.