(Adapted supernatural blessing from the Rime of the Frostmaiden campaign).

The spark of courage was bound to a spear that belonged to a frost giant named Vlagomir. The giant was a hunter of white dragons and a Chosen of Thrym, the evil god of frost giants. When Vlagomir died, his warrior’s spark was bound to the spear. Upon touching, the spear you gain this feat and the following abilities:

You gain 1 foot of height every hour and become proportionately heavier until you stand 21 feet tall and weigh 7,700 pounds. When you are 9 feet tall, your Strength becomes 19 unless it is already higher. For every 3 additional feet of height you gain, your Strength increases by 1, to a maximum of 23, and your Constitution score increases by 1, to a maximum of 21. Armor and clothing you are wearing and weapons you are carrying magically increase in size to match your growth. If you are the recipient of a greater restoration spell or similar magic, this charm vanishes from you, and you immediately shrink back to normal size, along with any armor, clothing, and weapons in your possession.