These are all universally playable in a bunch of different decks
While Valki may be based on Loki, the trickster God, hes everyones favorite infamous planeswalker Tibalt in disguise
The success of aggressive decks in Cube is highly contingent on having a high volume of one drops, and while it aint pretty some of Stonecoil Serpents power lies in the fact that it is a one drop in a pinch
When a creature with hideaway N enters the battlefield, look at the top N cards of your library, exile one of them face down, then put the rest on the bottom of your library. The sets update to hideaway allows N to be any number, changed from being inherently four previously
If you divide that by 80 uncommons, you'll get an average uncommon value of $0.35
This is a staple of Delirium decks until the end of time