Cast Storm Herd by paying ({8} magic symbol) ({W} magic symbol) ({W} magic symbol) , causing you to create a number of 1/1 Pegasus creature tokens equal to your life total.
At the beginning of your next upkeep, Mayael's Aria triggers, 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.