Voice of Truth
Protection from white is the strangest defensive keyword to hang on an Angel, and that contradiction is the whole point. Protection from white means it cannot be targeted, enchanted, equipped, blocked, or damaged by anything white, which makes it a creature designed almost entirely to fight other white decks: it ignores white removal, shrugs off white burn (such as it is), and swings through white blockers unimpeded because protection makes it unblockable by the very color the opponent is leaning on. The flying is the body's natural evasion; the protection is what turns the white mirror lopsided the moment it lands, because so much of the opponent's color simply cannot interact with it. This is an era when sets reached for protection-from-its-own-color creatures as a lever against whatever strategy was dominating the metagame. What you sacrifice is relevance everywhere else: against a deck without a single white permanent or spell, this is a plain 2/2 flyer with no functional text. That narrowness is the design discipline at work, because a creature this hard to interact with from one color has to be inert from every other angle, or it would warp every board it touched. The result is a hoser shaped like a beater, a 2/2 that reads as filler and plays, in the one matchup it was built for, as an answer the opponent's color cannot generate.
