Kydele/Thrasios combo (EDH / Commander)

Your "standard" Kydele + Thrasios list. Fairly well-tuned, but not quite to a cEDH level; depending on draws, it can usually expect to combo out somewhere around turn 5-7, though it's capable of comboing out faster with perfect draws and little-to-no disruption to its plans.

Those plans are pretty simple: land Kydele, equip Umbral Mantle, and draw 4 cards in one turn to tap for infinite colorless mana (or just 3 cards to make Kydele infinitely big and attempt to win with commander damage). If Thrasios is out, that infinite mana draws you your whole deck, at which point it's simple to just throw a Blue Sun's Zenith at everyone to deck them out. Prismite will turn the infinite colorless into infinite of any color.
Barring that, the Dramatic Scepter combo (Dramatic Reversal on an Isochron Scepter) will also give infinite, providing you have enough mana rocks and mana dorks out to get untapped. Narset's Reversal can stick onto the Scepter if Dramatic Reversal hasn't been drawn yet, and will have the same effect, just costing 3U instead of 2 to activate the combo (and allowing you to have infinite copies of other instants and sorceries as well).

The rest of the deck is simply draw (both to search for pieces and to boost up Kydele), as well as removal, ramp, and utility to keep from being too un-interactive before finding the combo. In the event that the table isn't a fan of combo decks and/or is slower in general, the sideboard contains a small selection of cards to de-power the deck; swapping out Umbral Mantle and Isochron Scepter will entirely remove the infinite-ness of the combos, though the deck remains capable of making some obscene amounts of mana and draw even without them (just a much more "fair" level). It's a fun deck to play with or without the infinite combo to end games with, and sometimes you just want the option to be able to play the deck at a variety of power levels.