Tekin's Enlarge/Reduce

You cause a creature or an object you can see within range to grow larger or smaller for the duration. Choose either a creature or an object that is neither worn nor carried. If the target is unwilling, it can make a Constitution saving throw. On a success, the spell has no effect.

If the target is a creature, everything it is wearing and carrying changes size with it. Any item dropped by an affected creature returns to normal size at once.

Enlarge. The target's size doubles in all dimensions, and its weight is multiplied by eight. This growth increases its size by one category-- from Medium to Large, for example. If there isn't enough room for the target to double its size, the creature or object attains the maximum possible size in the space available. Until the spell ends, the target also has advantage on Strength checks and Strength saving throws, however, it has disadvantage on Dexterity checks and Dexterity saving throws. The target's AC decreases depending on the target's new size, -1 to AC if enlarging to Small or Medium, -2 to AC if enlarging to Large or Huge and -3 if enlarging to Gigantuan or Larger. The target's weapons also grow to match its new size. While these weapons are enlarged, the target's attacks with them increase, the number of dice rolled for the weapon increases by one, for example, a paladin with a greatsword now rolls 3d6 instead of 2d6 and a giant ape would roll 4d10 instead of 3d10.

Reduce. The target's size is halved in all dimensions, and its weight is reduced to one-eighth of normal. This reduction decreases its size by one category--from Medium to Small, for example. Until the spell ends, the target also has disadvantage on Strength checks and Strength saving throws, however, has advantage on Dexterity checks and Dexterity saving throws. The target's AC increases depending on the target's new size, +3 to AC if reducing to Tiny or Small, +2 to AC if reducing to Medium or Large and +1 if reducing to Huge or Gigantuant. The target's weapons also shrink to match its new size. While these weapons are reduced, the target's attacks with them are reduced the number of dice rolled for the weapon decreases by one, for example, a paladin with a greatsword now rolls 1d6 instead of 2d6 and a giant ape would roll 2d10 instead of 3d10. If the reduction in dice was to make it that creature rolls 0 weapon dice than the dice sizes decreases to the next lowest dice (to a minimum of 1d4), for example, a fighter wielding a shortsword would roll 1d4 in damage instead of 1d6.