MSPA Forum Trollslum Wiki talk:Rules/@comment-208.54.4.249-20130604000405/@comment-4932028-20130604025750

Well that's a matter of opinion, I suppose. It first depends on whether you feel confident enough as an author to pull off the weird time and space shenanigans that would inevitably be involved in the joining of two very different species in a game of epic proportions.

Some would say there's no conceivable way in which this could work, but as I've said - it depends on the skill of the author as to whether it can be accomplished.

So yeah. There's nothing against it in the rules. If you want to do it, go ahead. Just remember that some people might be able to raise more credible opinions than mine.