she is truly sealed (by a Tiefling, nat 20) but nobody is certain of that. Not known it was a Tiefling. An elf is the impostor.
True tale, the great dragon (???) , the Miasma Magi was sealed not lojg ago by an adventuring party. The great magic's of a tiefling (???), the party sealed her away in an in disclosed location known only to great are,hives of great city (??) Refer to traveling tiefling city demiplane
In the mists of the power vacuum, the high elf halfcaster celestial warlock took place of tiefling as the great savior for sealing away the menace. The arising reports of a new green dragon is leading others to believe perhaps the seal is coming undone.
The great hero is no longer with us nor is the elf in play anymore.