For one, theres Lorcana use of ink as a resource used to play and activate cards - as well as serving as a fun part of the games multiversal lore that allows players Illumineers to conjure a Disneyworlds worth of characters out of ink
Remember, anything worth doing is worth doing right
This is very blatantly illegal, so theres a lot of opaqueness around the sellers since they constantly need to make new listings as old ones are shut down
You can also cast Veil of Summer to make your own free spells uncounterable, which definitely seems like a relevant thing to remember
Spiritmonger was about there being no way out, other than killing the player
Zinnia's primary ability, to get +X/+0 for each other creature you control with a base power of one is almost forgotten about with this ability, since you can make the most of your enter the battlefield effects and other strong effects to let you duplicate them