Archetype of Endurance

The Archetype cycle's design conceit is symmetry made one-sided: each grants its keyword to your side while stripping the same keyword from your opponents, so the enchantment is a buff and a denial in one body. This is the green one, and its keyword is the strangest fit for the mold. Hexproof is a defensive shell, protection your threats wear against targeted removal. Handing that shell to your entire board is expected. The aggression here is the second clause, turned outward: every opposing creature loses its hexproof and is barred from getting it back, which turns off the protection on Invisible Stalker, Sylvan Caryatid, and every commander built to dodge interaction. The eight mana pays for cracking open a defensive category on both axes at once. What earns the cost is the "can't have or gain" language: it does not just remove the keyword on resolution, it installs a continuous ban, so an opponent cannot re-equip protection or replay a hexproof body and shrug it off. Against a board leaning on hexproof to keep its key pieces safe, this lands more like a removal-enabler than a creature, suddenly making targeted spells and abilities that were dead cards live again. The 6/5 boar is almost incidental to the trick it carries.