There is also a list of what is expected at that level in a few barometers: two-card infinite combos, extra turns, mass land denial
In 2009 we saw the first Planechase cards, a year after we saw Archenemy schemes, and many years before, even before I'd started playing back in 2001 there were Vanguard character cards showcasing characters from the Weatherlight Saga
With only 1,008 copies printed in Alpha, finding one in this flawless condition is almost unheard of
Given the mechanics high complexity, its surprising to see
As for Runehorn Hellkite, I've never met a Wheel of Fortune I didn't like, and even though this one is pretty expensive at six mana, it also generates random value from the graveyard if you discard it to something like Survival of the Fittest and is uncounterable and instant speed
There were a bunch more Spirits or Spirit-adjacent cards I could have included here