"Trochę poświęcenia" ("A Little Sacrifice") is a short story in the Miecz przeznaczenia (The Sword of Destiny) collection by Andrzej Sapkowski. It tells the tale of star-crossed trans-species lovers: a siren called Sh'eenaz and a human prince called Agloval. on land, the prince decides that the contract was not fulfilled. However, just to ensure that the money not go to waste, he decides that it should pay instead for witcher investigating the mysterious deaths of a number of local pearl divers. Significant plot details end here.