Her Eldest Senior Brother has not yet fully resurrected; if the Earth Spirit Grand Archmage were to discover them, they would have no hope of escape.
Of course, even if her Eldest Senior Brother were resurrected, now is not the time to expose their location.
Having existed in an undead state for so many years, the Sky Spirit Grand Archmage must have depleted much of his strength, and he may not yet be a match for the Earth Spirit Grand Archmage.
Chapter 1060