Both Kruphix, God of Horizons and Omnath, Locus of Mana stop unused mana from emptying from your mana pool at the end fo each step. Omnath only works for green and keeps it green, while Kruphix works for all, but makes it colorless. If I have both on the field at the same time, which one takes priority? Do I get to pick?
If I have 2 blue mana, 1 white mana and 2 green mana at the end of a step, do I get to keep 5 colorless or 2 green and 3 colorless?