The Makia'wisag

"If they were not given what they asked for, they would point at the person, which would make him or her turn invisible."

From There Be Hodags, by C.A. McAllister:
The makia’wisag are the little people of the Brothertown Indian Nation, standing at about two feet tall. They are capable of making themselves or others invisible, and are said to carve strange symbols onto rocks. They are associated with whippoorwill birds, from which their name is derived.
Like many types of Wisconsin gnomes, the makia’wisag are benevolent and helpful towards those who give them offerings of gifts, but unlike the other varieties, the makia’wisag directly solicit their offerings. They travel door to door and request gifts, especially offerings of food, from the people living there. The makia’wisag will be friendly and helpful towards those who comply and give them their requested gifts. However, if one refuses to give an offering to the makia’wisag, the little person will point at them, magically turning the person invisible and paralyzing them. Once the homeowner has been cursed in this way, the makia’wisag will rob the person’s house of whatever it desires, often taking more than they had originally requested as a gift.
The makia’wisag have a number of small similarities with the other little people of Wisconsin lore. Like the Wauwatosa night visitors, they appear suddenly outside of a home, knocking on the door. Like the wemategunis, they demand an offering from a human and punish the human if they are refused. Like the house troll, they are known to burglarize people’s homes. Finally, like the memegwesiwuk, they are known to carve strange symbols on rocks.

From Wisconsin Legends and Lore, by Tea Krulos:
Many culture have stories of mischievous groups of small people who will play tricks, ranging from humorous to malicious if they are not appeased--a famous example would be the leprechauns of Ireland.
The Brothertown tell of a race of little people called the Makia'wisag, who would stop at peoples' houses asking for things to eat or small favors. If they were not given what they asked for, they would point at the person, which would make him or her turn invisible, and the Makia'wisag would sneak into the home and take whatever they wanted.

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