Although a common card, it's a fairly rare common: outside of its original Innistrad version (which was released well over a decade ago), it has only been reprinted in The List bonus sheet
Second, there have been serious issues with previous Arena Direct events , namely continued problems with people not actually receiving the rewards they've won, or product taking an abnormally long time to ship
The concept here is to Blight other players as much as possible, then target their creatures (or hope they block) so you can build your armies
(If a permanent with a finality counter on it would be put into a graveyard from the battlefield, exile it instead.) Finality counters work on any permanent, not only creatures
It makes a boat load of treasure, and also fuels Aggravated Assault