The winner of the game is the one who reaches their win condition uninterrupted first, so its a good idea to force your opponent to answer the threat on your board either by having creatures present at all times or by playing spells that help you reach your winning turn
T: Add B or R to your mana pool.BR: Rakdos Keyrune becomes a 3/1 black and red Devil artifact creature with first strike until end of turn
Urza not only does actual everything, from killing things to drawing cards to gaining life to making threats, but he gets to do it twice a turn, with a huge starting loyalty
I might spend endless hours, days, or weeks drafting Khans of Tarkir and decide that Jeskai Tempo is hands-down the best archetype
This deck has a solid core of aggro threats, Pheonix Chick and Bloodthirsty Advasery, that is enhanced by cards like Mechanized Warfare and Kumano Faces Kakkazan, which enhance the power of those threats