Blasting the Ruins

Edison Card Text
You can only activate this card if there are 30 or more cards in your GY. Inflict 3000 points of damage to your opponent's LP.
No targeting
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●Even if you activate Blasting the Ruins and an effect is chained that reduces your GY to less than 30 cards, Blasting the Ruins still resolves because the condition was correct at the time of activation.
edisonformat.com
Even if you activate "Blasting the Ruins" and an effect is chained that reduces your Graveyard to less than 30 cards, "Blasting the Ruins" still resolves because the condition was correct at the time of activation.