Most obviously, you can use Powerstones to cast artifact spells, like the retro version of Scrap Trawler from the Brothers War bonus sheet, which reads, Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value. Wait, lesser mana valuelesser mana value than WHAT
The +2/+0 and trample is relevant damage and evasion for the aggro decks, and an aura that can return itself to your hand over and over again for a single mana is relevant for the enchantress decks
So it speeds up the game for you and slows it down for your opponent
A search function would also greatly aid the process of trading in Pokmon TCG Pocket
This gives us a narrow pool of cards to choose from
Jund is one of the color wedges in Magic: The Gathering representing the colors of Black, Red, and Green