A very useful plugin, it's there, there's no plugins that will allow you to change the drops in the special world.
Big plus: permission for every drop
different drop in worlds, example: if you breaked nether stone in
nether - it is
can drop quartz on 15%, BUT if you breaked nether stone in
world or end - it
is drop only nether stone.
Minus: version 1.11
Author not update plugin