They are similar to the One Ring from the Lord of the Rings MTG crossover that ended up selling for millions to Post Malone
Below you can see a few playtest cards from early in design exploring different ways for art stickers to be used
If they have any sacrifice outlet or discard outlet, let the sabotage commence, otherwise you can initiate self-destruction with an instant-speed edict like Tergrid's Shadow and sacrifice the two best creatures instead of their worst
Lucky for us, almost all the ones we want to play are artifacts, which happen to be historic-cant you smell the synergy cooking
The usual flicker targets are still great, like Archaeomancer and Peregrine Drake, but Rassad makes a number of lesser played creatures much more interesting
Lets go through the most potent and reliable enablers of the last 30 years: 20