Some things that may draw you into specific colors are: A really strong rare you're excited about Plenty of "removal" cards that can deal with your opponent's creatures A lot of playable cards in that color A good "mana curve" in that colormeaning lots of creatures of different costs Ideally, the colors you pick will have all four of these criteria, but if two or three of those are true, that's plenty good
I drafted some dumb BUG value pile because i'm a tryhard, but you were in the perfect seat for a really sick R/B vampires deck
Synchro Stovie and Silvy for Rciela and use Woes for her cost to search Tales
Passively creating a flying creature every turn is a fantastic way to beat board wipes and put some pressure on planeswalkers
Copperajahs primary attack is Copper Nose, which deals a base damage of 100, but further deals 100 more damage if the defending Pokmon is of Basic-type
Its my favorite Piplup card and Im over the moon for it