As long as Blaziken's remaining HP is 40 or less, Blaziken does 40 more damage to the Defending PokÃ©mon (before applying Weakness and Resistance).
Searing Flame 10
The Defending PokÃ©mon is now Burned.
Damage Burn 50+
If the Defending PokÃ©mon already has any damage counters on it, this attack does 50 damage plus 20 more damage.