Tengu format ruling
Armed Dragon LV10
Card effect (current official text)Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by Tributing 1 "Armed Dragon LV7". You can send 1 card from your hand to the GY; destroy all face-up monsters your opponent controls.
Rulings
(C) This card cannot be Normal Summoned or Set. (U) This card cannot be Special Summoned except by Tributing 1 Armed Dragon LV7 on your side of the field. (1) By sending 1 card from your hand to the GY, destroy all face-up monsters on your opponent's side of the field.
- The (C) Condition cannot be negated.
- The (U) Unclassified Effect applies in the hand (this Special Summon doesn't start a Chain).
- You can't Special Summon Armed Dragon LV10 with Level Up! because Armed Dragon LV7 doesn't mention Armed Dragon LV7 in its card text.
- Can't be Special Summoned from the GY / banished, even if it was properly Summoned.
- The (1) Ignition Effect activates & resolves on the field.
- Sending 1 Monster Card from your hand is a cost. This effect can't activate while Macro Cosmos is active, since you can't pay the cost.
- Face-down monsters are not destroyed.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.