The Commander rules state that your deck can only use colors that appear on your Commander, but that doesn't necessarily mean the casting cost

The following creature types were introduced in Ice Age : Aurochs Barbarian Blinking Spirit (superseded by Spirit) Brownie (superseded by Ouphe) Centaur Dead (superseded by Zombie) Dinosaur Dog Dryad Erne (superseded by Bird) Fiend (superseded by Horror) Fox Frostbeast (superseded by Elemental Beast) Goat Gorilla Pack (superseded by Ape) Hipparion (superseded by Horse) Illusion Infernal Denizen (superseded by Demon) Insect Kraken Lemure (superseded by Spirit) Lhurgoyf Mage (superseded by Wizard) Mercenary Mistfolk (superseded by Illusion) Ouphe Pyknite (superseded by Ouphe) Ranger (deprecated) Shyft (superseded by Shapeshifter) Tarpan (superseded by Horse) Tiger (superseded by Cat) Titan Toad (superseded by Frog) Wight (superseded by Zombie) Wiitigo (superseded by Yeti) Wolverine Worm Counter types[] The set introduces Healing counters , Ice counters , Music counters , Paralyzation counter , and Sleight counters as new counter types

It appears to be Russian, according to Google Translate given the first three words " ".chepner chepner2020-03-11 15:52:03 +00:00Commented Mar 11, 2020 at 15:52 The character (tricky, because the italics version looks more like a Latin "u" than "y"), suggests Belarusian.chepner chepner2020-03-11 15:58:03 +00:00Commented Mar 11, 2020 at 15:58 @chepner It's clearly Russian
Throw in a very reasonable stats-to-cost ratio for a Kamigawa legend, and you have an incredibly solid Snakes commander
In mono-green decks or 2-color decks that can reliably cast it, its a card you never mind drawing
This eleven-mana instant does a lot of work but getting to that point can be difficult