Edison format ruling
Evil HERO Infernal Prodigy
Card effect (current official text)If you control no monsters, you can Special Summon this card (from your hand) in Attack Position. Once per turn, during the End Phase, if this card was Tributed this turn to Tribute Summon a "HERO" monster: Draw 1 card.
Rulings
(S) If you control no monsters, you can Special Summon this card from your hand in face-up Attack Position. (1) If you Tribute this card to Tribute Summon an Elemental Hero, Destiny Hero, or Evil Hero monster, draw 1 card during this turn's End Phase.
- This (S) Special Summon effect does not start a chain.
- The (1) mandatory Trigger Effect activates during the End Phase.
- This effect ONLY ACTIVATES ONCE, even if Tributed for HERO monsters multiple times this turn.
- This effect WILL STILL activate if Prodigy is removed from play when Tributed (by Macro Cosmos) or after it was Tributed (by Soul Release).
- The (1) effect will NOT trigger if:
- after being Tributed, Prodigy is Special Summoned to the field prior to the End Phase.
- after being Tributed, Prodigy is shuffled into the Deck prior to the End Phase.
- after being Tributed, Prodigy was added to the hand prior to the End Phase.
- Prodigy is Tributed to Set a HERO monster.
- the Tribute Summon of a HERO monster was negated (by Solemn Judgment).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.