Bogles relies on stacking auras onto a single hexproof creature like Slippery Bogle or Gladecover Scout, so targeted removal is mostly dead, but Arms of Hadar gives -2/-2 to all their creatures and can kill their small hexproof threats before they get enchanted, sidestepping the hexproof problem entirely since it targets the player rather than the creatures. Thorn of the Black Rose provides a deathtouch blocker that discourages profitable attacks and grants the monarch card advantage to keep pace. Cut Abandon Attachments and Plunder the Trollshaws for more proactive answers, since this matchup is decided by whether you can remove their single threat before it becomes unbeatable.