Advanced format ruling
Herculean Power
Card effect (current official text)Once per turn, if your opponent controls a monster and you control no monsters, you can Special Summon 1 Level 4 or lower Gemini monster from your hand.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.