Hey, this is an adaption of a list I saw recently, that combos with Paradox Engine to generate tons of Value.
Approach of the Second Sun carries an odd synergy with Aetherworks Marvel allowing you to cast it the first time with Marvel and bury it under 6 cards. Then in response to your draw step spin those 6 cards off the top of your library, draw Approach, then cast it from your hand assuming you have 7 mana. (Maybe ramp with Servant of the Conduit?)
That is basically a one card addition as an alternate win condition. The other way this deck wins is something like this:
T1: Attune
T2:Puzzleknot/Servant
T3: Crack Puzzleknot/Rogue Refiner
T4: Marvel and spin it for a Paradox Engine
T5: Combo off grabbing Whales and clones to keep resetting Marvel
T5+: Gonti's Aether Heart to take another turn, then strike with your army of flying battle whales
16 Whale Count:
x4 Aethertide Whale,
x4 Peema Aether-Seer,
x4 Saheeli's Artistry (counts as two whales),
+ Baskers + Puzzleknots + every nonland (and even some lands) in the deck that produce Energy.
It feels very flexible for a combodeck, and is pretty cheap to make ($81).
Plz give me some feedback for what you think this deck needs.