Tengu format ruling
Red-Eyes Black Metal Dragon
Card effect (current official text)Cannot be Normal Summoned/Set. Must first be Special Summoned (from your Deck) by Tributing "Red-Eyes B. Dragon" equipped with "Metalmorph".
Rulings
source: Rulings_Tengu (Format Library) · 1 era-inappropriate line(s) removedRulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.