| “ | This is squadron Heroes of Grayskull. And for the last time, we're signing off. | ” |
–Serenia's latest recording | ||
Heroes of Grayskull was a group appeared in Adora & Ben 10's saga. It was the unit created by Mara and Aron to prevent the Eternians from activating the Heart of Etheria.
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- Madame Razz