Creatures:
The creature gets a health save against this curse.
(A creature that wants to be shrunk may choose to fail its save.)

Fail:
You shrink the target up to three sizes, but no smaller than tiny.

Giant -> Huge -> Large -> Medium -> Small -> Tiny

While shrunken,
the target has disadvantage on all tests of Strength
and every 5 ft. it moves costs it an extra 5 ft. of movement.
Additionally, when it would deal damage with a weapon:
If it would normally roll a die larger than a d4 for damage, it rolls a d4 instead (no big dice).
If it would normally roll a d4 for damage, treat it as if it had rolled a 1 instead.

(Smaller creatures are easier to grab and drag.)

Pass:
The target is not shrunk,
but the next time it deals damage before the end of its next turn, you may set the result of one of its damage dice to 1.

Items:
The object is shrunk down to a fraction of its size (but typically not to a size significantly smaller than what would fit in your pocket), and its weight is reduced to 1.
If the item is on a creature’s person, they get a save to prevent the item from being shrunk.

You can end this spell as a fast action.
You can also reduce the effect of this spell as a fast action.

Suggested Backfire: The target grows to four times its size.