If there's a cost associated with having a creature attack a player, its controller isn't forced to pay that cost, so it doesn't have to attack that player
After a while, you win a pack for nearly every other level up
There are organizations that specialize in grading the condition of cards, and a card's rarity affects how much it could sell for secondhand
Legendary Creature - Elemental Cat Creature (CTRL to add secondary) Draw Black Cat, Cunning Thief When Black Cat enters, look at the top nine cards of target opponent's library, exile two of them face down, then put the rest on the bottom of their library in a random order
Some of the stronger options include Alandra, Sky Dreamer, Homunculus Horde, and Minn, Wily Illusionist
Sensei's Divining Top Blinkmoth Nexus Auriok Champion Auriok Salvagers Aether Vial Arcbound Ravager Arcbound Worker Azusa, Lost but Seeking Boseiju, Who Shelters All Conjurer's Bauble Cranial Plating Crucible of Worlds Darksteel Citadel Desperate Ritual Zuberas