If you gain an amount of life "for each" of something or "equal to the number" of something, that life is gained as one event and Minwu's last ability triggers only once
You can pat yourself on the back for clever use of the legend rule to be your sacrifice outlet, and yes you come out with a measly one treasure per transaction, a lot of other triggers happened along the way, when a creature dies, when an artifact comes into play or is sacrificed, those payoffs can win you the game
For example, if the opponent is searching their library for a basic land card, you can't have them find a different card, such as a creature card
And man, are these new cards insane
Baeloth is a sorcerer companion from Baldur's Gate Enhanced Edition , where he's an exile from a gladiatorial fighting ring he used to run in the Underdark