Brass's Tunnel-Grinder / Tecutlan, the Searing Rift Brass's Tunnel-Grinder does a wheel effect, then just needs a little rummaging to consistently get to Tecutlan, the Searing Rift which adds a ton of value on mana spent for your permanents
Last but not least is Leyline of the Void, which shuts down any graveyard shenanigans while simultaneously saying goodbye to anything your opponents discard
This can be used as a way to break your opponents boards, perform interruptions, and even destroy your own Fire monsters that have effects on destruction
While these decks are pretty different in some aspects (the paper draft was from a 6-person pod), they share a lot of the same core concepts
They affect trust, cause confusion, and even change how Pokmon fans and collectors interact and spend money
No other ink has access to this quality (or quantity) of card draw, making amethyst the go-to ink for control shells