Goat format ruling
Spirit Ryu
Card effect (current official text)During your Battle Step, if this card battles (Quick Effect): You can discard 1 Dragon monster to the GY; this card gains 1000 ATK/DEF until the end of the Battle Phase.
Rulings
"Spirit Ryu’s" effect is considered Spell Speed 1, but may be activated multiple times in the same Battle Phase. Other Rulings:
- [Spirit Ryu's] effect can only be activated in the Battle Step. This is where the attack is declared. Because you can activate multiple chains during this step, as long as you have Dragons in your hand, you can discard them 1 at a time to keep [using] Spirit Ryu's effect. You can't discard, say, 4 in one shot. 1 at a time and your opponent get's the chance to respond/chain.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.