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
Finishers/ Surprise /Alternate win conditions Duke Ulder Ravengard at the beggining of combat in our turn, gives another target creature we control Haste and Myriad until end of turn
Legendary Creature - Eldrazi Kozilek's Unsealing Devoid (This card has no color.) Whenever you cast a creature spell with mana value 4, 5, or 6, create two 0/1 colorless Eldrazi Spawn creature tokens with "Sacrifice this token: Add ." Whenever you cast a creature spell with mana value 7 or greater, draw three cards
Allowing your opponent to mutate first and then using a kill spell is always at least a 2-for-1, maybe more