Copies of the card from Stronghold, for instance, typically sell for around $22
The official name of these reprints is the SLX program. These are in-universe functional reprints of UB cards
With it being Floodborn, of course that means he has the Shift keyword too, which reduces his Ink cost from 3, to instead just requiring you to discard an action card from your hand to get him into play
You can also curve Llanowar Elves into this card into a 5-drop
Finally, there are special promo cards that tend to have different symbols based on the event theyre associated with
It has a splashy effect that is viable in no other format but Commander, and Scourge allows you to dabble in the politics of Commander games (unlike say, Thundermaw Hellkite who just Hulk smashes an unfortunate opponent)