Each The Lord of the Rings: Tales of Middle-earth Draft Booster contains 15 cards and 1 token/ad card or Helper card, including 1 card of rarity Rare or higher and 3 Uncommons, 10 Commons, and 1 Land cards
This is one of those cards that Ill have to try and report back on because there are a lot of variables, some good and some bad, but its worth trying
You can mix and match, for example grab two from the Phyrexia: All Will Be One set and grab two from the Dominaria United set to battle against each other
Its most often seen on legendary status cards
There is a very, very small chance you might run into them with more veteran playgroups, but virtually everybody now uses the London and Commander Mulligans
It doesn't matter whether Knowledge Seeker was on the battlefield when the first card was drawn