Forging of the Primes

Create four Song tokens. (They're artifacts with "{t},
sacrifice this artifact: add one mana of any color.")
Creatures you control get hexproof and +1/+1
until end of turn.
"These Songs were deemed too powerful to be wielded
by the Ardoni freely. Thus, they were given to the
Masters of the four Ardoni clans as a sign of Peace
and unity."
-11th Wall of Time