The spriggan's size triples in all dimensions, and its weight is multiplied by 10. This growth increases its size from Small to Large. The spriggan remains changed for one hour, or until it takes a bonus action to end the effect. The spriggan has advantage on Strength checks and Strength saving throws, and the spriggan's weapons grow to match its new size. While these weapons are enlarged, the spriggan's attacks deal an additional die of damage on a hit.