Edison format ruling
Raging Flame Sprite

Card effect (current official text)This card can attack your opponent directly. If this card inflicts battle damage to your opponent by a direct attack: This card gains 1000 ATK.
Rulings
- The +1000 ATK lasts as long as Raging Flame Sprite remains face-up on the field. Raging Flame Sprite can continue to get +1000 ATK each time it successfully attacks directly (becoming ATK 1100, then ATK 2100, etc.).
- The effect of Raging Flame Sprite is a Continuous Effect that cannot be chained to.
- The effect of Raging Flame Sprite is resolved after damage calculation and before Flip Effects are resolved (so the timing is the same as Don Zaloog and Airknight Parshath).
- If Raging Flame Sprite is equipped with Twin Swords of Flashing Light – Tryce, its ATK will increase by 1000 points after each successful attack (Raging Flame Sprite must still deal at least 1 point of damage with each attack for its effect to apply). So the second attack will be with +1000 ATK, and it will gain another +1000 ATK after the completion of the second attack.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.