Rather, a second "reflexive" ability triggers when you sacrifice Eden, Seat of the Sanctum this way
So you could potentially sacrifice Bloodsoaked Champion when you cast Korvold, and then next turn when Korvold attacks, put its attack trigger on the stack, activate the Champions raid ability to put it on the battlefield, then sacrifice it to Korvolds ability, and if you still had mana left over you could bring Champion back again the same turn
Edgar and Sorin both became vampires, and Sorin also had the Planeswalker spark
You'll always have a full hand with this enchantment in play
Seeing a new opportunity to milk some money from their respective franchises, games companies throughout the world rushed to make their own version of the CCG hit and try to snap up their share of the pack money
Of course, the age of these two cards undoubtedly plays a large part in their overall value