Bog Roosh

The Bog Roosh, a mermaid-witch from Hellboy: The Third Wish. Three mermaids perform a task for her in exchange for a wish for each. The first wishes to be reunited with her lover. The Bog Roosh informs her that said lover is dead, then raises him as a zombie; he promptly attacks and kills the mermaid. The second mermaid wishes for legs and lungs, so she can be united with the human she loves. The Bog Roosh grants this immediately; as they're at the bottom of the ocean, the ex-mermaid drowns. The third mermaid wishes for a lost spear, so she can return it to the grave of her father. The Bog Roosh hands over the spear, and the mermaid safely swims away to deliver it.