Acclaim Entertainment declared bankruptcy in 2007 and the newly created Valiant Entertainment, Inc. bought back the rights to many characters. Valiant Comics was relaunched in 2012 with a rebooted universe. Ivar was reintroduced in 2012 in the first story arc of "Archer & Armstrong" Volume 2 by writer Fred Van Lente and artists Clayton Henry and Brian Reber. "Archer & Armstrong" #0 later revealed that the three brothers gained immortality when Ivar activated a strange machine known as the Boon, a device that gave them this gift by draining the life force from their entire home city-state and destroying the surrounding area. The same incident also temporarily removed Ivar from physical reality, turning him into a timewalker. In 2015, Ivar was the title star of the 12-issue series "Ivar, Timewalker" by Fred Van Lente with art by Clayton Henry and Brian Reber.