Blaze

Blazes are mobs that were added in Update 0.12.1. They spawn in the Nether in Nether Fortresses from Blaze Spawners. They drop 0-2 Blaze Rods when killed.

ATTACK
Blazes attack by shooting 3 fireballs at the player, which sets him/her on fire. If the player gets close, they can also attack by charging at the player. They can hover, making them quicker and harder to fight in open spaces.

Combat
Blazes can be defeated easily using an Iron or Diamond sword, but the fact that they spawn in groups of 2-3 makes them very dangerous. The easiest and cheapest way to kill Blazes is to use Snowballs. At least one Fire Resistance enchanted Armor is recommended, and potions like Fire Resistance will make the fight easier.

Previously, they attacked the player in creative. But as of Update 0.13.0, Blazes do not attack the player anymore in Creative Mode.

Trivia.

 * Blazes actually do not have a 'body'. The inside is hollow.
 * Blazes, Snow Golems and Endermen are the only mobs that will take damage from Water and rain.
 * Blazes, unlike other mobs, take 3 damage from snowballs.
 * Blaze's fireballs cannot harm the players if they have Fire Resistance Effect.