Players decide and announce in turn order, starting with the active player, which color they are choosing
This thing is pretty strong, and Clone is run in 6,859 decks over at EDHREC.com which should be pretty easy to swap this over for them
For instance, Arceus ex from Triumphant Light is a popular one, not just because of its sheer damage output (up to 130!) but also because it fits into many decks
Its not uncommon for an opponent to fold if they fail to answer Mother of Runes immediately, and in matches where this isnt the case, that can mean that the opponent just doesnt care about the creature axis of the game at all, which isnt a better scenario, merely a shifting of the bad feelings
Kethek, Crucible Goliath Its like a Rakdos Neoform or Birthing Pod - but in reverse