REDU format ruling
Hardened Armed Dragon
Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)(This card is not treated as an "Armed Dragon" card.)
You can Special Summon this card (from your hand) by sending 1 Level 8 or higher monster from your hand to the Graveyard. If you Tribute this card for the Tribute Summon of a Level 7 or higher monster, that monster cannot be destroyed by card effects.
Rulings
(U1) You can send 1 Level 8 or higher monster from your hand to the GY and Special Summon this card. (U2) If you Tribute this card for the Tribute Summon of a Level 7 or higher monster, that monster cannot be destroyed by card effects.
- The (U1) Unclassified effect is a built-in Special Summon. This does not start a Chain.
- This can only be used to Summon this card from the hand.
- Sending 1 Level 8+ monster from your hand to the GY is a cost.
- The (U2) Unclassified effect does not activate. It applies to the Tribute Summoned Level 7+ monster.
- This effect applies even if Skill Drain negates the effects of the Tribute Summoned monster.
- If this card is Tributed to Summon Earthbound Immortal Aslla piscu while there is not face-up Field Spell Card on the field, Earthbound Immortal Aslla piscu will not be destroyed by its own effect.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.