Advent of a New Age

Converge - Advent of a New Age comes into play
as each color of mana spent to cast it.
You can only cast spells that share a color
with Advent of a New Age.
Spells you cast cost {1} less for each color shared
with Advent of a New Age.
Creatures you control with a number of +1/+1
counters equal to the number of colors they share
with Advent of a New Age.