Brainstealer Dragon The most unique part of this card is probably the Dragon Horror typing, and yet I do rather like the combination of board presence, card advantage and direct damage this brings to the table
Teferi, Temporal Archmage and Tamiyo, Field Researcher provide card draw, untapping, and control to close out games
Having more cards gives you more options and can put you in a better position to win the game
Itll also be an investigate machine, allowing you to create Clues whenever creatures die, are blinked, or exiled, and that makes it a very strong fit in Azorius creature decks including Brago, King Eternal, Yorion, Sky Nomad, and the like
Gaining life and drawing cards is blue and white's general modus operandi, but the addition of affinity for artifacts means you could be playing this for as little as one white and one blue mana instead of the hefty usual cost
Proxy cards are especially popular for testing expensive cards before purchasing originals or building personalized cube environments without needing to source rare singles immediately