There are ten color pairs in Magic: white-blue, white-black, blue-black, blue-red, black-red, black-green, red-green, red-white, green-white, and green-blue
On the other hand, if a spell or ability deals lethal damage to a creature enchanted with an Aura that has umbra armor, the game rules regarding lethal damage cause the Aura to be destroyed, not that spell or ability
Cards that allow you to play extra lands, such as Exploration, Burgeoning, and Azusa, Lost but Seeking, provide tremendous amounts of ramp
But his real utility is that he gives other Villains +2/+2
These took place after declaring attackers, declaring blockers, and assigning damage