Galina's Knight

Protection from red on a two-mana white-blue body is hate worn on the sleeve: the stats are incidental, the keyword is the entire point, and the design is keyed to a single opposing color. Protection from red means damage from red sources is prevented, red removal cannot target it, and red blockers cannot stop it from connecting, so against a mono-red opponent this is simultaneously an unkillable beater and a creature that walks past every defender. Against any other deck it is a vanilla Merfolk Knight, which is the deliberate price of the design: a sideboard answer dressed as a maindeck creature, exactly as good as the metagame's color balance allows. It belongs to an allied-color protection cycle (Vodalian Zombie, Shivan Zombie, Yavimaya Barbarian, Llanowar Knight, and this one), where each member carries protection from the enemy color shared by its two allied colors: white and blue both answer to red, so this is the pair's hate-bear against it. The lineage runs back to the single-color protection creatures of the earliest sets, White Knight and Black Knight chief among them: narrow, lopsided bodies that are dead weight in the wrong matchup and oppressive in the right one. The whole cycle is a tidy lesson in conditional power, where the rate is fixed and the value floats entirely with who is sitting across the table.