This enemy is essentially a slightly stronger cousin of the Grey Shield Bat in Cavern 4. Again, they come in massive swarms and can definitely prove more of a nuisance. Fire or Ice type weapons would be a good choice. Poison type weapons can work well, also. When attacking the rather dangerous Blue Big Shield Eel, these enemies can distract your characters from attacking the eel. Along with the Grey Shield Bat, they are currently one of the most represented enemies (220 in total), even beating the Pink Gel Spider (159) in ???, but beat out by the White Triangle Germ (300) in Hell 2. These enemies also make it hard to drag the characters straight to the "Next" signs repeatedly to go straight to the "BOSS" screen without taking a heavy amount of damage in the process. Although the damage they deal is low, the sheer number of almost all 220 attacking at once can cause a rather insane amount of damage in total by the time the player reaches the "BOSS" screen, possibly making it easy for the boss and its zombie minions to finish the team off. To prevent this from becoming such a troubling task, have either a Priest with 80 DEX or higher or a Silver Crystal 4 on every weapon before entering the stage. This way, players can drag the team without taking that great an amount of damage, allowing the player to be ready for the boss.