Thread:MistofMists/@comment-38110184-20191023212930/@comment-31797469-20191023213949

There are only six known Natural and one known Magical element. So currently even if an Island had all known elements, a Natural-Magic hybrid could at most have seven elements.

However, if we get a total of four Magical elements (which seems possible, if we get one for every Island replacing an Outer Islands), then we could theoretically end up with 10 possible interbreedable elements.

An Island with all 10 elements would have 1023 possible monsters/element combinations. This seems a bit excessive to me for one Island. And so far we have only seen 4 elements per Island in MSM, and only up to 5 elements on a monster in DoF.

For all these reasons I don't think we will ever see a 10-element (Decim) Monster.