Edison format ruling
Hino-Kagu-Tsuchi

Card effect (current official text)This card cannot be Special Summoned. This card returns to its owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. If this card inflicts Battle Damage to your opponent, they discard all cards in their hand during the next Draw Phase, before they draw.
Rulings
- When your Hino-Kagu-Tsuchi inflicts Battle Damage to your opponent, he / she discards his / her hand before drawing in their next Draw Phase. If their next Draw Phase is skipped, they discard at the start of the Standby Phase. If the Draw Phase and Standby Phase are skipped, they discard at the start of Main Phase 1.
- The opponent cannot activate any effects at the start of their turn before they discard their hand for the effect of Hino-Kagu-Tsuchi.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.