Red-Eyes Retro Dragon

Flying

At end of combat, if one or more of your Red-Eyes
creatures are destroyed this turn you may, {t}: Create a
Red-Eyes creature token with Defender and 0/X,
where X is the number of Red-Eyes creatures sent to the
graveyard this turn.

{3}, {t}, As an additional cost sacrifice Red-Eyes
Retro Dragon: Add {b/r}{b/r}{b/r}{b/r}{b/r} mana for the
summon of Red-Eyes Black Dragon only.