You can't count on the Archangel actually connecting with lifelink through combat as she's one of the only targets for the removal spells your opponent has had in their hand all game
That said, Eldrazi Displacer has been an incredibly impressive card in all formats, and its a card I like having in my deck against G/W Tokens specifically
Walking Ballista (Shout out to Triskelion) I consider Triskelion to be the best-designed card from Antiquities
Beyond just the contents of the collectors guides, these hardback books are high-quality, with thick paper stock on each page, subtle gold foiling on the covers and spine, and a matte finish that prevents fingerprints and other markings
However, Calhoun also features the Resist +1 ability to protect from damage and can get two lore every time she banishes another character in a challenge on the player's turn
One of those keywords was protection from Black and Red, so Red and Black targeted removal like Dark Banishing couldn't touch her