delta species booster box Buy the EX Pack here on the page Delta Species Booster Pack -

Dark Element X SPELL If you have a "Gate Guardian" monster in your GY: Pay half your LP

You can find Alchemy: Duskmourn packs available in the MTG Arena Store starting October 15

while the first Magic set would be "The Gathering", future sets could be labeled as "Magic: Arabian Nights" or "Magic: Ice Age"

With the Mists of Lorien, you have a chance to pick and choose which cards you want to get rid of, or all of them if you have enough mana

GR Gold Rare Oracle of Zefra X SPELL Field When this card is activated: Add 1 "Zefra" monster from your Deck to your hand

Just like the vending machines you know and love, when supply runs low, the machine will be restocked