Has multiple win conditions however in order of most likely to win with.

1 Alter of the Brood bounce combo

2 Blue sun's Zenith w/ infinite mana combo

3 Martial coup w/ infinite mana combo

4 Approach of the second sun

5 Umbral Mantle w/mantles combo

6 Elspeth, sun's champion ult

1- alter, traxos or golem, and a zero drop artifact in play. Then cast either helix or knack on traxos or golem and tap to bounce zero drop replay untap opponet mils 1 repeat tell no cards left then pass turn.

2/3- infinite mana combo (IMC)= training Grounds , paradise Mantle, and pili-pala. Grounds in play pili-pala with out sickness equip paradise to him and tap him for AC(any color) mana doesn't matter. Then use that 1 AC and grounds trigger to untap pili to add blue or white mana to your pool. This mana stays in your pool. Then tap to add AC again which puts you at 2 mana in pool, so and that AC to untap and 2nd blue or white mana, now 2 floating mana. Then repeat tell you have infinite mana or 100 mana depending on card to cast. Blue sun's Zenith target opponent, which you can do before there draw step. Martial coup boardwipe and infinite creatures. As a reminder this can be turn 3 infinite mana. T1- blue mana, training Grounds, and paradise Mantle. T2- 2 mana source, and pili-pala. T3 equip and start engine.

4- Approch win normal, or if you have IMC you just cast blue sun's Zenith on your self and recast.

5- Mantles Combo= any creature ideally in this deck ornithopter or traxos, Training Grounds, and both paradise mantle and umbral Mantle. Grounds in play creature without sickness, equipped with both mantles. Now you tap add AC, grounds trigger on umbral and use AC to untap and give +2/+2. Now repeat tell one swing kill, either infinite or 100+ power. Ornithopter if bo blockers can block him, however weak to fatal push. Traxos more ideal do to tramp and harder to remove.. not impossible but harder.

6- elspeth ult makes all your stuff bigger and more deadly do to flying. But she has removal and protection in the form of tokens. She is a great distraction as well if you need it.

All combos when on the battlefield are a win that turn. Of course as long as no summoning sickness or opponent interaction infers. Sideboard is based off what you need this board is a rough idea to what I feel helps support this deck. However gideon or karn are other good replacements for elspeth. But you have lifegain via sanguine sanctuary, storm and tron stop/ slower damping sphere, and leyline of Sanctity to prevent hand disruption and to protect yourself.
Then extra combos in side board to help combat an opponent from being ready for a game 1 combo now replaced or modified with a different combo or variable.
This is a deck pieced together from various other decks I have made. However it should still stand up to most other decks very easily. And you can even swap it to a mono blue and add control in the sideboard to better your game 2 odds.