At the beginning of your upkeep, Mayael's Aria triggers, causing you to put a +1/+1 counter on each creature you control and gain ten life.
Activate Willowdusk by paying {1} and tapping it, putting ten +1/+1 counters on a creature you control with power ten or greater.
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.

Win the game at the beginning of your next upkeep

Mayael's Aria

Willowdusk, Essence Seer

At the beginning of your upkeep, Clearwater Goblet triggers, causing you to gain at least five life.
Activate Willowdusk by paying {1} and tapping it, putting at least five +1/+1 counters on Sage of Hours.
Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.
Repeat each turn.

Combos with "Willowdusk, Essence Seer"