MonoBlueTron's winning Pacifis deck from March 2018 is still legal in April 2018!
Pacifis is a grueling control deck which uses Pacifis, the Phantasm City to generate advantage and dominate a game.
You can read more about this deck in the top-4 report of the March 2018 tournament:
https://ygoprodeck.com/trinity-format-march-2018-trinity-cup-deck-profiles/