Disease: Freezing Death

Symptoms: These symptoms include fatigue, chills, and visible dark veins that appear on the creature’s body. The infected creature’s speed is reduced by 5 feet as long as it remains infected. Every 10 days after symptoms appear, an infected creature must succeed on a DC 11 Constitution saving throw, or its speed is reduced by another 5 feet. If a creature’s speed is reduced to 0 as a result of this disease, the creature dies and its body turns into a statue made of ice.
Contagious: Known ways of transmission is coughing. Saliva is confirmed to transmit the disease. Blood has not yet been confirmed. Touch has been theorized, but not confirmed.
Lore Inspiration: The disease is directly inspired by Matthew Mercer's Explorer's Guide to Wildemount, so no cheating and looking it up.