Card Rulings:Odd-Eyes Gravity Dragon

OCG Rulings

 * "When this card is Special Summoned: You can return all Spell and Trap Cards your opponent controls to the hand. Your opponent cannot activate cards or effects in response to this effect's activation." effect is a Trigger Effect. (Its effect does not target. It can be activated during the Damage Step.)


 * If "Odd-Eyes Gravity Dragon" is successfully Ritual Summoned, then it was Special Summoned by "Monster Reborn" from the Graveyard. You can activate the "You can return all Spell and Trap Cards your opponent controls to the hand." effect.


 * "Your opponent must pay 500 LP to activate card effects." is a Continuous Effect.


 * If your "Odd-Eyes Gravity Dragon" is under another players controls; pay 500 LP to activate card effects, you cannot perform this effect's activation. (You pay 500 LP instead for each one.)


 * The "Your opponent must pay 500 LP to activate card effects." effect of "Odd-Eyes Gravity Dragon", if the opponent is to pay 500 LP, this effect's activation cannot be preformed. The opponent pay 500 LP is not a cost to activate this card's effect. Therefore, in this case, Chain its effect during the Summoning of "Mathematician", you cannot activate "Cash Back".