Ice Slasher

Ice Slasher (アイススラッシャー) is Ice Man's Special Weapon. It's an arrowhead of ice that can either damage or freeze enemies. Not only is this Fire Man's weakness, but Mega Man can also freeze the flame geysers in his stage and in the first level of Dr. Wily's base to use as steps.

Bosses weak against Ice Slasher

 * Fire Man: Mega Man, Mega Man: Dr. Wily's Revenge and Mega Man: Powered Up
 * Flash Man: Mega Man: Dr. Wily's Revenge
 * Mega Water. S: Mega Man: The Wily Wars
 * Fire Snakey: Mega Man: The Wily Wars
 * Heat Man: Mega Man: The Power Battle

Bosses immune to Ice Slasher

 * Bomb Man: Mega Man
 * Cut Man: Mega Man and Mega Man: Dr. Wily's Revenge
 * Elec Man: Mega Man and Mega Man: Dr. Wily's Revenge
 * Guts Man: Mega Man
 * Yellow Devil: Mega Man
 * Copy Robot: Mega Man
 * Enker: Mega Man: Dr. Wily's Revenge
 * Heat Man: Mega Man: Dr. Wily's Revenge
 * Wily Machine: Mega Man and Mega Man: Dr. Wily's Revenge
 * Wily Machine (2nd Form): Mega Man: The Wily Wars

Other media
Mega Man uses Ice Slasher in the Mega Man animated series.