The construction of new feasting halls could also be the preparation for treacherous murders of royalty. In the "Ynglinga saga" part of the "Heimskringla", Snorri relates how, in the 8th century, the legendary Swedish king Ingjald constructed a large feasting hall solely for the purpose of burning all his subordinate petty kings late at night when they were asleep. According to "Yngvars saga víðförla", the same ruse was done by the Swedish king Eric the Victorious and the Norwegian ruler Sigurd Jarl, when they murdered Áki, a rebellious Swedish subking, at Gamla Uppsala, in the late 10th century.