Dropping Gems (Fade in)

- Used an EntityModifier to make the gems seemingly fall from some place
by fading in, rather than spawning immediately.
Revert "Dropping Gems (Fade in)"

This reverts commit 19226d5fc249e5e09d77675320010e1e2a79e5fe.
Revert "Revert "Dropping Gems (Fade in)""

This reverts commit 334f1369de0c1938d39264dabcda24692cfc736a.