All Energy attached to Charizard ex are Energy instead of its usual type.
Burn Down もやしつくす
Discard 5 Energy attached to Charizard ex. This attack's damage isn't affected by Weakness, Resistance, Poké-Powers, Poké-Bodies, or other effects on the Defending Pokémon.
This card seems to be heavily based on Base SetCharizard. Energy Flame's effect is virtually identical to Energy Burn (and, in fact, is completely identical to the version on the Stormfront reprint), and Burn Down takes Fire Spin's "heavy damage with a sizable Energy discard" concept to extreme levels.