Jandel vs Jhai

Jandel and Jhai clash in an epic battle, and the wiki's advice is to seek cover or witness greatness, which is all the detail there is on what happens. The only mutation listed beside it is Ash, worth x4 and applied by the Hazehound pet; the entry names no mutation produced by the clash itself. Monster Mash lists that same Ash and Hazehound pairing.