It's simple: all of your creatures and lands are separate, but you each share the same 30-point life total and take your turns simultaneouslyplus you can block for each other too
These include the cards condition, its age (with cards from 1999-2003 typically worth more), limited print runs, and even production errors
The semi faded/wispy/soft edges on the art of the mons just helps this era stand out and Emerald has a lot of good looking commons and uncommons as a result Milotic EX is another awesome one already mentioned, but my favorite EXs from this set are the Regi Trio
is equal to the number of Beebles you control
Decks which focus on summoning various different Planeswalkers into play are called "Super Friends decks"
This is a huge Flavor win, as Cactuar's 10,000 Needles attack always inflicts that much damage in Final Fantasy games