In cube you can't really have 10% of your deck as one mana discard cards as their are not enough, the options become too weak too quickly and the good ones get hoovered up very quickly
The only certainty produced from these conversations came when I asked, "How bad would it be if they entered on your side, then moved to the protector's side during combat?" Finally, everyone agreed on something: it would be very confusing and distracting, would potentially shift around planeswalkers you were planning to attack, and I shouldn't have suggested such a thing
As long as the scientists were present, the specimen floated patiently or swam quietly about, biding its time, watching
Compounding this is the Secret Lair: Raining Cats and Dogs release that sold out immediately
I guess that one could slot it into a Nekusar, the Mindrazer deck if one were so inclined
In addition to the power dump Flayer of Loyalties gives to the stolen creature, it itself has Trample and Annihilator Two as well