Up to 1 minute
A creature/object you can see within range grows larger or smaller. Choose a creature or an object that is neither worn or carried. If the target is a creature, its clothing and possessions change size as well. Any item dropped by the creature returns to normal size at once. If unwilling, the target can make a Con saving throw. On a success, the spell has no effect.
The target's size in doubled, its weight x8. Its size increases by one category (i.e. M to L). If there isn't enough room, the target attains the max size in the space available. Until the spell ends, the target has advantage on Str checks and saving throws. The target's weapons deal an extra 1d4 dmg.
Opposite of all enlarge effects. Weapon attacks deal 1d4 less damage (this can't reduce the damage below 1).
a pinch of powdered iron
Magnitudo Incremento (Enlarge) / Diminuito (Reduce)