A 6-mana creature that must survive a turn cycle to have an impact doesnt line up with the current format, especially since this elder dinosaur can whiff
Mind Grind will cause your opponents to reveal cards from the top of their library until they reveal X amount of land cards, and then put all cards revealed that way into their graveyard
Well, for a lot of color pairs it offers a crucial, extra typed dual land that also has a little bit of card advantage stapled to it, as a treat
Akroma's Memorial is much more expensive, costing seven colorless mana, but also gives your creatures flying, first strike, vigilance, trample, and protection from black and red
Apart from this article, I dont know anything about playtesting in Pokmon, especially not during the WotC era