Red crystal for fire staff

Have you gone through the path that leads to the bird boss which drops Aqua Garb?If you have,I will start explaining on the map before the bird.

As soon as you enters,first you should see the dragons (just to confirm you are in the right path).Then,walk straight and you should see stairs,ascend to the 2nd floor and you should see a few pillars with a hole on the floor ahead of them.

Advance through while avoiding that single hole,and ascend to the 3rd floor with the ladders.As you reached the 3rd floor,there should be two pathways,take the right (one that looks like an entrance with the inside considerably spacious-kinda room).

Advance straight to the end of that room (if you see a ladder you are on the wrong path) and you should see a mob with red japanese name.I forgot but it should look like a dragon as I remember.This is the mob that drops Red Crystal.Note that if you can't atleast take on the mobs within this area by yourself,you have close to none chance of killing this mini boss.

Extra Note:If you are looking to obtain the Fire Staff directly,a mob in the map before the kaiser boss drops the fire staff as a Rare item.It looks like a Dragist and this method are far easier unless you are looking for the red crystal for selling/stats enchancing purposes.