Zur the Enchanter

The combat trigger is the whole design: a 1/4 flier with evasion that converts every attack step into a free enchantment tutor, dropping the piece directly onto the battlefield rather than into hand. That last clause is what makes the card a toolbox engine instead of a card-advantage spell. The mana value 3 or less ceiling is the constraint that keeps it honest, but the body subverts it cleverly: the 1/4 frame plus flying makes Zur hard to profitably block, so the engine can keep running turn after turn rather than firing once. White-blue-black is the exact color identity for the enchantment-control toolbox the card wants to assemble, giving access to lockpieces, protection, and inevitability all under one attack trigger. What the design really represents is a tutor that pays you for attacking, a structural inversion of the usual rule that attacking and assembling a combo are competing uses of a turn. With Zur the two collapse into one action, which is why builds around him tend toward Pacifism-style locks and aura-based protection rather than a beatdown plan; the 1/4 was never meant to win the game with damage. It was meant to win it one enchantment at a time.