Hi Sligo! Please note that the Lost Gifts appear in the game for a certain time period and their amount is restricted. They are distributed across the Global Map. Many Jarls are aiming to get the Lost Gifts so that involve them in a big competition.
For staying aware of the Holiday Invaders, please see the Event tab in the game and follow our official Facebook page where we publish all information on upcoming game events and news. Here is the link: https://www.facebook.com/VikingsWarOfClans

For more information about the Lost Gifts and other Holiday Invaders please follow the link: https://vikingsweb-support.plarium.com/web/en/guide/invaders-and-uber-invaders/holiday-uber-invaders

I wish luck and glorious victories!