Magic would not be nearly as enjoyable if every game were the same, especially between the same decks
The most expensive Eternatus Vmax is not a special illustration, but a Prize Pack card
The domed top machines were the most popular machines and are now difficult to find
The fact that it can be splashed into a white or black aggressive deck or can be fully utilized in a balanced W/B deck is important since it allows the card to be successful if either color is, giving it potential flexibility over some kinds of monocolored cards if its powerful enough to splash for
Tarkir: Dragonstorm and Edge of Eternities also had some really powerful designs, and while they weren't my favorite Limited environments, they definitely added some great cards to Standard (honorable mention, Consult the Star Charts)
If X is 5 or more it gets you a card to help solve another problem, and 10 or more increases the size of your army