It will consist of 100 cards, both reprints of existing cards along with newly commissioned Final Fantasy art, as well as new cards designed with Magics most popular format, Commander
Unfortunately, the newly introduced Sabin [11-018H] wont have a Blitz command (special ability), but its been designed to be a Forward with high power, just like in the original game
Tidus, Yuna's Guardian* The commander deck version of Tidus is all about counters and moves them around during your turn, and provides significant card draw and proliferation capability
Adventures feature instant or sorcery abilities that can be played in place of the rest of the card
There were a lot of people clamoring for it, myself included eventually, and I suspect it is the start of a much greater investment into Universes Beyond
Click here for the Ruby/Sapphire Upgrade Guide