Geography
Mrtvachast's frozen sea is broken only by jutting ice flows and three large, but mostly barren islands that rise like ancient monoliths from the icy waters. These islands, devoid of any significant vegetation or wildlife, are harsh and unforgiving, their rocky surfaces battered by the relentless winds and icy waters of the strait. The two largest of the three islands are a desolate expanse of rugged terrain, their sheer shores and rocky lands offering little respite from the elements. The other island is smaller, but no less barren, with its stark landscape a testament to the harshness of life in the frozen north. Together, these islands and ice flows create a stark and inhospitable landscape, a place where only the hardiest of creatures can survive.
History
Legend has it that Mrtvachast was once a strip of land joining eastern and western Etomesto, until a mighty, but forgotten, hero slayed a massive dragon that terrorized the land. In a climactic battle, a Psoglavi hero struck a fatal blow to the dragon, causing it to thrash in its death throes and shatter the land beneath it. The force of the dragon's death throes created the strait, splitting the land and forever changing the landscape of Etomesto. This heroic act gave the strait its name, Mrtvachast, which translates to "Dead Dragon" in the psovrazgo language, a testament to the heroism and sacrifice of this forgotten Psoglavi hero.
Interestingly, the stories in Inis Mona tell of a similar event that supposedly created the strait. According to these tales, the strait was formed when a Fwoarian hero named Unknown slew a great serpentine sea-beast that had been terrorizing the waters. In a mighty battle, CĂș Chulainn struck the final blow to the sea-beast, causing it to thrash and writhe in its death throes, creating the strait as it died. The similarities between these two stories have led some to speculate that they may be different interpretations of the same event, passed down through generations and adapted to fit the cultural and mythological beliefs of each region.