At the beginning of your upkeep, Mayael's Aria triggers.
Holding priority, cast Hatred by paying ({3} magic symbol) ({B} magic symbol) ({B} magic symbol) and an amount of life equal to nineteen minus the greatest power among creatures you control.
Resolve Hatred, causing the creature who has the greatest power among creatures you control to have a power of at least nineteen until end of turn.
Resolve the Mayael's Aria trigger, causing you to put a +1/+1 counter on each creature you control, gain ten life, and win the game.
Results
Win the game at the beginning of your next upkeep.