Avacyn, Guardian Angel

The protection here is literal and granular: a repeatable damage-prevention shield that names an enemy color and shuts off every source of it for a turn, scaling from a single creature up to an entire player or planeswalker. The 5/4 flying, vigilance body is competent rather than commanding, which is exactly the point of the design. This is a control piece wearing a beater's clothes. The cheaper activation answers a single attacker or a burn spell aimed at an ally; the expensive one fogs an entire color's assault before it reaches your face. Both modes ask you to read the board and pick the right enemy color, which is unusual: most prevention effects are blunt, and this one rewards knowing precisely what is coming. The card's defining constraint is that it defends others first. The cheap mode explicitly cannot protect Avacyn herself, only "another target creature," so she stands as a guardian willing to take the hit while shielding everything behind her. That is faithful flavor doing real mechanical work: the guardian who cannot guard herself. It is a quieter take on the character than the double-faced archangel who would later define an entire block, an Avacyn built to absolve and prevent rather than attack, the protector rendered as a wall of conditional fogs instead of a wrath waiting to flip.