Amber/Amethyst has a variety of tools that help you draw cards and put Banished characters back into your hand, which will enable you to keep a card advantage over your opponent and eventually stall them out
This last group is also easily identified by the SP logo at the bottom left corner
Well, you'll either need to collect the cards from Arena booster packs for the sets they came in, or else directly 'craft' the specific cards you need using MTG Arena Wildcards - effectively tokens you can exchange for the exact Common, Uncommon, Rare, or Mythic Rare card you want, depending on the type of Wildcard
Illustrated by Kazumasa Yasukuni, it shows Dragalge bathed in light from above and surrounded by brilliant, swirling spirals of color, an abstract take on the Pokmons potent poison
Look at the right edge of the artwork box