Oak Street Innkeeper

Most hexproof protects whatever is sitting still: untapped blockers, idle threats, the board you've already committed. This Elf inverts the geometry by guarding exactly the creatures that have done their work. Tapping out into an attack, leaving up a mana dork, or holding back a tapped attacker on the crackback turn all leave creatures exposed during the opponent's turn, and that is precisely the window this card seals. On your own turn it does nothing, which is the point: it cares only about removal aimed at your tapped creatures while the threat of action sits on the opponent's side of the table. The effect reads narrow until you notice how much of a green deck's life is spent with creatures tapped sideways or drained for mana, and how often targeted removal is held for the open shot rather than spent on a fresh blocker. As a 1/2 it offers no board presence to speak of, so its job is purely structural: it asks you to play around the opponent's instant-speed answers less, because the cheap pieces you've already invested in are insulated the moment they leave themselves vulnerable. A protective effect that keys off the tapped state rather than the creature itself is an unusual axis, and it rewards a board built wide and active rather than one held back in reserve.