In both cases, however, its probably not worth derailing your core game plan for
This black card is a stellar endgame play for almost any black-heavy deck, and one of black's best creatures overall
Since The Archimandrite's activated ability doesn't have a tap symbol in its cost, you can tap creatures that haven't been under your control since your most recent turn began (including The Archimandrite itself) to pay the cost
This card is basically a second Lotho, Corrupt Shirriff, but a bit worse: it creates less Treasures, and they'll be tapped
I never even heard of it until people started stonking on it in 2020
If you have this card in your collection, viewing it in the My Cards section lets you move the card around and is the best way to take in all of those sparks of light