Sorry for the late update, but you should still be able to breed the latest rare monster – the rare spunge – for a few more hours. The spunge is the 8th monster to have a rare relative. The breeding combination for the rare spunge is – as always – the same as the regular spunge. You can get the rare spunge monster at Cold Island or Water Island.
Try one of these combinations to breed the rare spunge:
You can also buy the rare spunge in the market – 65 diamonds each.