REDU format ruling
Ryu Senshi

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
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.
Rulings
- This card’s effect that negates Spell Cards that target it is not optional.
- You can Special Summon this card from the GY with Monster Reborn because its effect that negates Spell Cards is not active while it is in the GY (but only if was properly Fusion Summoned originally).
- A Spell Card that targets this card may be activated, but it will be negated and destroyed.
- The effect of this card will not negate Creature Swap, Fissure, Smashing Ground, Dark Hole, Raigeki, or similar cards that do not target.
- If you try to equip Fusion Sword Murasame Blade to this monster, it will be negated and destroyed.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.