Killed Offscreen: All of the Fake Numbers not owned by the Fearsome Four are destroyed offscreen after Don Thousand's defeat
Like most Magic: The Gathering cards, the value of Sauron, the Dark Lord depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (The Hobbit Commander)
There are some sub-themes that benefit from +1/+1 counters, like fling decks or high-power matters decks
I think there is a reasonable distinction between modes two and three as you need library manipulation to do a hefty hit with any consistency
That version was the main prize for winning the Shonen Jump Championship in 2007
In all honesty, maybe pitting the main characters literal starting Pokmon against such a beast