This is whats known as decking your opponent
Craft is a really crazy and dense mechanic, with a lot going on
Perhaps it's an additive thing and Kastral used up many of the copies in circulation, allowing Keeper to spike now
Typical control strategies want to extend the game as long as possible and inevitably take over in the late game
Grading services like PSA can authenticate cards and assign condition grades that protect your investment
There are 6 Common cards, 1 Common or The List card (The List being special cards, usually reprints, the selection of which can change between sets), three Uncommon cards, 1 non-foil Wild Card (this can be anything from the main set that the booster is a part of), 1 Rare or Mythic Rare from the boosters set, 1 Foil card of any rarity, 1 Basic Land card and, finally, 1 non-playable card, which can be a token, play aide, ad card or art card