Koma remains uncounterable, letting you safely cast it into any blue player with open mana, which is important particularly late in the game
Chaos: Whenever you roll Chaos, choose target creature you control, that creature fights target creature an opponent controls, if your creature does not die, you become the monarch
However, depending on its mana cost and abilities, there may be better options like Murder for straightforward removal or Sorin, Solemn Visitor for a more versatile approach that can also provide life gain and creature buffs
Duelists Convocation International While I havent played Magic for as long as some veteran players, I have been playing long enough to have a DCI number
If heads, switch 1 of your opponents Benched Pokmon with their Active Pokmon
Those could have been reslabbed and kept the same cert number