Once again, you’ve fallen for one of my classic pranks. Bazinga!

Fetofetal transfusion is a condition in which one twin (recipient) will be hypervolemic, in cardiac failure, and plethoric, while the donor twin will be hypovolemic, shocky, and pale. Chronic fetofetal transfusions can result in a discrepancy of weight of over 10%.

These are exemplified in the scurfy, scaly affections which appear in the bend of the knee (mallenders) and hock (sallenders) and on the lower parts of the limbs, by scratches, and by a scaly exfoliation […].

For the Norse mythologies, Ullr was the god of winter. Son of a frost giant, he would rule Asgard in Odin's absence in the winter.