She doesn't escort the dead to the afterlife, but instead raises them to fight and die again.

Adarkar Valkyrie

Flying, vigilance
{T}: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control.

Flying, vigilance
{T}: When target creature other than this creature dies this turn, return that card to the battlefield under your control.

Flying, vigilance
{T}: When target creature other than Adarkar Valkyrie is put into a graveyard this turn, return that card to play under your control.

The List

Commander 2018

Commander 2014

Flying, vigilance\r
{T}: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control.