FZero Drops

• Added Florifer.
• Added Advancement to unlock it.
• Added loot table for its special drop (god help me).

To get that loot, you must:

1. Kill a hostile mob with Florifer (do not work with all of them, but most of the normal ones will do).
2. Both you and the mob must be stepping on wet farmland or a flower. Essentialy, bot of you must be in a "Garden".