Battle Box with cards printed in black border sets after Fallen Empires and before Mirrodin. That's why some cards from white border core sets are excluded while cards from Portal sets are included.
The box uses pretty standard Battle Box rules: each players gets one of each basic land and one of each Invasion tapland (Coastal Tower, Salt Marsh, Urborg Volcano, Shivan Oasis, Elfhame Palace) for a total of 10 lands.
Each player draws 4 cards at the beginning. No mulligans.
Afterwards standard Magic rules for 1vs1 games apply. 20 life, going first means no card draw during your first turn, one land per turn. Each player has his own deck and graveyard (graveyard order matters for some cards!), but you can never run out of cards.