Empyrial Archangel

A wall between you and every burn spell and combat hit in the game, sold as a single creature you almost cannot remove. The redirection is the whole proposition: as long as this thing stands, your life total stops being a destination for damage entirely, and all of it piles onto a body that starts at eight toughness. Crucially, the redirect covers all damage dealt to you, so evasive or unblocked attackers do not slip past it; their swings simply land on the Archangel instead. Shroud is what closes the obvious escape hatch. An opponent staring down a creature that has become their only path to your life total would normally just point removal at it, but they cannot target it at all, which leaves combat or a destroy-based answer as the honest routes through. The toughness number does real work too: eight is past Lightning Bolt range, past most efficient burn, and high enough that grinding through it with attackers means committing a board you would rather not. The design tension is that the promise is deliberately incomplete: a destroy-based board wipe like Wrath of God still kills it, edicts make you sacrifice it, and a large enough attacker can trade through the eight toughness in combat. The protection is conditional on the creature surviving by means other than targeting, which is exactly what makes it a defensive lynchpin rather than an autowin: invulnerable to the most common ways players die, and quietly answerable by the rest.