Edison format ruling
Inferno Fire Blast

Card effect (current official text)Target 1 "Red-Eyes B. Dragon" in your Monster Zone; inflict damage to your opponent equal to its original ATK. "Red-Eyes B. Dragon" cannot attack the turn you activate this card.
Rulings
- No copies of Red-Eyes B. Dragon can attack if you activate Inferno Fire Blast.
- If Red-Eyes B. Dragon attacked, you cannot activate Inferno Fire Blast during Main Phase 2, but if Red-Eyes B. Dragon did not attack, you can activate Inferno Fire Blast during Main Phase 2.
- As long as a Red-Eyes B. Dragon is on the field when you activate Inferno Fire Blast, Inferno Fire Blast still resolves normally even if Red-Eyes B. Dragon is no longer on the field when Inferno Fire Blast resolves.
- If you control Red-Eyes B. Dragon and activate Inferno Fire Blast to inflict damage, and then after that resolves you activate Non-Spellcasting Area, Red-Eyes B. Dragon still cannot attack because Non-Spellcasting Area will not negate the condition.
- If Imperial Order is chained to Inferno Fire Blast, the effect of Inferno Fire Blast is negated but Red-Eyes B. Dragon cannot attack. However, if Magic Jammer negates the activation of Inferno Fire Blast, your Red-Eyes B. Dragon can attack.
- If you activate Inferno Fire Blast while Non-Spellcasting Area is active, the effect of Inferno Fire Blast disappears.
- If you only have 1 Red-Eyes B. Dragon on the field, you can activate multiple copies of Inferno Fire Blast designating that same Red-Eyes B. Dragon.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.