Advanced format ruling
Ryu Senshi
Card effect (current official text)"Warrior Dai Grepher" + "Spirit Ryu"
A Fusion Summon of this card can only be done with the above Fusion Materials. When a Normal Trap Card is activated (Quick Effect): You can pay 1000 LP; negate that effect. This card must be face-up on the field to activate and to resolve this effect. Negate the effects of any Spell Card that targets this card and destroy it.
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.