Edison format ruling
Hero Flash!!
Card effect (current official text)Banish "H - Heated Heart", "E - Emergency Call", "R - Righteous Justice" and "O - Oversoul" from your Graveyard; Special Summon 1 "Elemental HERO" Normal Monster from your Deck. All "Elemental HERO" Normal Monsters you currently control can attack your opponent directly this turn.
Rulings
- "HERO Flash!!" only affects "Elemental Hero" Normal Monsters that are on the field when it resolves.
- Even if you are unable to Special Summon an "Elemental Hero" Normal Monster from your Deck, your "Elemental Hero" Normal Monsters can still attack directly.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.