Artifacts with colored mana costs get assigned to initial cardpools as if they were plain artifacts and with no account to the colors (so you can get an Ethercaste Knight for example in a nominally mono-red apprentice deck). This causes pools to have unusable uncommons and rares.

Can something be done about this? Something should because when you factor in that a 36 card pool at apprentice can seemingly have up to 10 multicolored cards - in different colors AND different rarities - this makes the average Shandalar deckpool unplayable in ways in which it wasn't before.

EDIT: Edited for autocard, ty Aswan Jaguar, sorry about that.