Blue Bubble
These cursed monsters are found in many dungeons. Defend yourself with your shield, this will knock its blue flame out. All other items will also accomplish this purpose, but defending is the safest method. They also seem to be attracted to bombs, because when Link throws one near a Blue Bubble in Ocarina of Time, they circle it until the bomb explodes. When it drops to the floor simply attack it with your sword. Beware, because contact with its blue flames will cause curses in Majora's Mask and The Wind Waker, and you will be unable to use your sword for a few seconds (but instantly can be removed by the Song of Storms); if it touches you in the latter game, you'll be unable to use any item at all!
Also, note that in The Wind Waker, rather then using your shield to put out the flames, you must use your Hookshot or Deku Leaf. Ice Arrows are also effective, but it costs arrows and magic.
In Twilight Princess and Phantom Hourglass, similar enemies called "Ice Bubbles" can be found, but instead of cursing you, they freeze you in a small block of ice when they touch you. It is best to attack these enemies from a distance using the Hero's Bow or the Gale Boomerang. The Clawshot is not advised. In Phantom Hourglass, the Bow, Boomerang, and Grappling Hook work best.
