Bonds of Mortality
Green almost never gets to answer protection cleanly, and this is one of the few cards that hands the color a switch for two of the most frustrating keywords it faces. Hexproof and indestructible are the twin walls green's removal package keeps slamming into: fight effects bounce off indestructible, and targeted answers can't even begin against hexproof. The repeatable activation here strips both from every creature an opponent controls at once, for a single green mana, which turns a board of untouchable threats into legal targets for whatever the rest of the deck wants to do. The design discipline is that it removes the shields but never throws the punch: it forces a partnership with a removal suite that can finally connect, and stands for nothing by itself. The cantrip on entry earns its slot against decks running no protected permanents; you trade two mana for a card and keep the enchantment on the battlefield as latent insurance for when something with hexproof or a Darksteel-style indestructible body shows up later. It is built as a specialist's tool: not a card you reach for in a vacuum, but the thing you slot in when the format's biggest threats have decided they can't be touched.
