You can join local gaming groups or clubs to participate in card battles
Does not have the pokeball or box
I did actually read through that thread, and the few others about Master Balls before posting
You may choose any card type, but the ones that may appear in your library are artifact, creature, enchantment, instant, land, planeswalker, sorcery, and tribal (a card type found on some older cards)
For example, using it to prolong Unbreakable Formation gives all your creatures indestructible for only five mana
Each player takes on the role of a planeswalker, a dimension-hopping sorcerer with the ability to call upon powers and creatures from throughout an expansive multiverse of varying fantasy genres