Note: This game is also titled Monster Farm DS 2.Finding the Phoenix
Become an "S" rank breeder. Then, go on an expedition to Volt Magma (the volcano). As soon as you start moving forward, you will see an Amber Event Crystal. Go to it, and it will show the Pheonix flying over the volcano. Keep moving until you reach the top right part of the map to see another event crystal. This will create a bridge of cooled magma which you can walk across. There will be another event after you cross where you almost get hit with a falling rock. After this, there is an event next to you where you get a gold peach, which increases a monster's lifespan. Cross the bridge, and continue walking down the path toward the center until you eventually find another event. You will see the injured Phoenix on the ground. Your assistant Cleo will use your golden peach on the Phoenix to revive him. He will then fly away and leave a feather behind, which you can use as a mixing item.