When you first enter the battle he will cast a white doom and gloom bubble. This will last for 4 rounds. During this time you can only use traps, any blades will be removed immediately. After 4 rounds the bubble will change. It will become a black bubble. During this time only blades will be allowed and any traps will be removed. It is advised to use up any traps/blades you have cast before the end of the bubble because they will all be taken off at the end. Windstorms, mass prisms, pet traps and pet blades will be allowed but will be removed when doom and gloom is changed. You are not allowed to use a single attack if you do not have and blades (if a blade round) or traps (in a trap round). If you single attack Sylster he will use a powerful RA that will attack all players with a 1630 base damage. If you hit Water-wing he will use Rebirth that heals all the bosses 375 health but does not cast absorb. If you hit Spellhammer Sorcerer he will cast a normal scarecrow.