There is more of a race element to it to get to those first come, first served bonuses
Because this set was the first to do so, many of these cards are valuable
Mythics (20 of 20 known) Liliana of the Veil $90 Karn, Liberated $90 Cavern of Souls $80 Tarmogoyf $70 Snapcaster Mage $70 Temporal Manipulation $65 Karakas $60 Dark Depths $50 Emrakul, the Aeons Torn $40 Kozilek, the Butcher $40 Bitterblossom $40 Vengevine $38 Mana Vault $30 Mikaeus, the Unhallowed $27 Ulamog, the Infinite Gyre $25 Leovold, Emissary of Trest $20 Lord of Extinction $16 Sigarda, Host of Herons $16 Balefire Dragon $15 Platinum Emperion $14 That folks, is as good as your mythics list is ever likely to get in a booster box based Magic set
That helps him rationalize giving cards away so freely when others are more interested in turning a profit
It introduces the new mechanics of Tag Team GX cards, cards featuring two Pokemon that are stronger and have powerful effects
Whenever a card is placed in an opponent's graveyard from anywhere, you may have that player lose two life while you gain two
