More than 140 different sets, dozens of formats, and about 30,000 cards can be very confusing
You defeat your opponent if you reduce their life points to zero, or if they've run out of cards in their deck and need to draw one
I immediately went and bought 2 copies each at $600
Teaching games - small streamlined decks tend to focus on one strategy, and use a few specific tactics, mechanics, to get there - a larger and more unfocused deck can be used to teach new players broader groups of mechanics and the way they interact better than competitive decks can
When Treasure Mage enters the battlefield, you may search your library for an artifact card with mana value 6 or greater, reveal it, put it into your hand, then shuffle
If an ability changes a cards creature types then it doesnt modify any land types, artifact types, or whatever else the card might have