You can't choose multiple creature types, such as "Cat Warrior." A Cat Warrior is both a Cat and a Warrior
When it hits a player, it exiles the top card of each player's library and allows its controller to cast one of these cards by paying life equal to its mana value instead of the mana cost
Actually winning the long game takes some combination of plentiful hard removal, void-fueled card draw (Decode Transmissions, Hymn of the Faller and Voidforged Titan) and bigger threats like Syr Vondam
Copycrook Two generic, two blue Creature Shapeshifter Rogue You may have Copycrook enter the battlefield as a copy of any creature on the battlefield, except it has Whenever this creature attacks, it connives. Corrupted Shapeshifter Three generic, one blue Creature Eldrazi Shapeshifter Devoid (This card has no color.) As Corrupted Shapeshifter enters the battlefield, it becomes your choice of a 3/3 creature with flying, a 2/5 creature with vigilance, or a 0/12 creature with defender