Din's Fire is the side special move of Princess Zelda. She uses it in each of her playable appearances since Super Smash Bros. Melee. Din's Fire is based on the spell of the same name from The Legend of Zelda: Ocarina of Time.
The move involves Zelda launching a fireball from her hands that travels while the player holds down the special attack button. The fireball explodes automatically after a set time or when the player lets go of the special attack button, causing the fireball to damage any opponents caught within. The amount of damage increases as the fireball travels, and more damage is dealt if opponents are closer to the center of the explosion. If the move is performed in the air, Zelda is left helpless immediately after the explosion. Zelda can also alter the direction the move travels by angling the control stick while holding down the button.
In Super Smash Bros. for Nintendo 3DS / Wii U, the first custom variant for Din's Fire is Din's Flare, which travels farther but cannot be angled and deals a set amount of damage regardless of distance. The second is Din's Blaze, which sends out a larger, visible fireball that does not travel as fast and lingers for a moment before dealing a more powerful explosion.
Zelda using Din's Fire on Captain Falcon in Super Smash Bros. Melee
Zelda using Din's Fire in Super Smash Bros. Brawl
Names in other languages
Din no Honō