NestPlus

If you break any leaves it has chance to drop a nest.
After you open it you have chance to get specified items.

You can specify items that can be opened from the nests in the config.yml and also you can specify the nest material, name, lore and drop chance from the leaves.

In the game when you break leaves you have chance to get a nest that you can open.

/nestplus help : Show commands
/nestplus reload : Reload config.yml and lang.yml

nestplus.reload : reload command permission. Default: OP
nestplus.open : opening nests permission. Default: everyone

If you tested it on an another minecraft version and it's worked please write a comment. Thanks.