Primeval Titan is the main win condition for Amulet Titan by representing a large attacker and a tutor for various lands, including the combo finisher of Valakut, the Molten Pinnacle in combination with Dryad of the Ilysian Grove
Going wide is always good, as is having expendable blockers when youre on the offensive
Three is quite a lot just for card quality and won't bail you out of savage mana screws however it is typically played in more long term decks which are far less likely to keep land light hands
You are very happy to put one of these infront of a planeswalker while it can be painful to have to chump with a mana source
It didnt introduce anything revolutionary, as it was the basic set, but it has more than a dozen EX Pokemon across all three booster packs
It cant earthbend the land it fetches, but you dont want it to: You want to hit a fetch land that you can crack to find a second land, then it comes back into play for a third landfall trigger