If a card costs 6 mana, it basically has to say you win the game, and while Dream Eater does a lot of stuff, it honestly doesnt give you any card advantage just tempo, which is a problem for something thats 6 mana
Of course, The One Ring's unusually high price may go down once it enters the secondary market, making it more accessible to novice players who simply want to play with LotR cards
Then that player loses half their life
While perhaps an interesting artistic choice, it matches the style used in the Pokmon Rumble game, which is where the illustration comes from
You can only use each effect of "Rescue-ACE Preventer" once per turn
Once it has entered the battlefield, Siege Rhino makes combat an absolute nightmare for your opponent