Hi... Here is a way to beat deadbeard on crossbone isle. Deadbeard is extremely tough (stronger than fusion dragon). You need to be at least between lv35-45 to have a chance.
BRING SOME WATER OF LIFE AND LOTS OF POTIONS IT WILL BE A LONG BATTLE.he'lusually use these attacks against you:Freeze prizm, Spark plasma, Inferno, Guard, and Break.
You have to have ground (will freeze Deadbeard for one attack)and flash (will make deadbeard's attack do very low damage) to survive.
1:use flash on first turn 2:use ground and do a mars summoning 3:use mia to heal after deadbeard attacks by using Wish Well(healing after using ground would be usefull as deadbeard attacks twice).
Reapeat thease 3 steps (you still might die but its how I deafeated deadbeard) to beat deadbeard.
The chest that he was guarding contains Demon mail. It raises your defense by 51, but it's cursed.
P.S Quartz and Dew are needed too if mia dies.
Added by: TheGoldenSun2 , ID#90