It looks like Sebastian Kempgen's BukyVede font has an Easter egg encoded as U+F8FF:
A poster featuring the phonetic transcription of "механизм" in the International Phonetic Alphabet (IPA).
A poster featuring a sphere.
A poster featuring the ball-and-stick model of the fulvalene molecule.
A poster featuring the morphemic analysis of the Russian word марсоход.
Discover a new Old Church Slavonic word every day.
A curated list of awesome resources on Old Church Slavonic.
Fun Easter egg on Google's Access Proxy page.
Browse ASCII art and Easter eggs.
Fun hieroglyphic Easter eggs in the Aegyptus font.
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