mtg hybrid mana cards rules in Magic: The Gathering decks What is the CMC? :

Selesnya (white-green) is one of the most consistent two-color combinations in Commander, and the combination of card advantage from Monarch with steady mana ramp from Vibranium gives this deck a genuinely strong, low-variance game plan

Its not as powerful as a threat on its own, but most of the combo potential is still there

2004-10-04 If an opponent steals control of Lich and no other effect prevents you from losing with a life total of zero, you will lose the game due to a zero life total as a State-Based Action before you can take any actions

This allows phasing cards to keep counters, auras, and equipment attached to them when they phase back in