What to do for Episode 50? (Patreon)

OK, so we are rapidly approaching the 50th episode of Monster Man (counting specials we're actually almost there, but let's just stick to episodes of the main series). I want to celebrate it in some way, but I don't know what the best method is. A listener mailbag special? Nothing but monsters from the World of Synnibar? (I might save that one for April.) Something else? I'm open to suggestions!