Spectral, Dragon Ruler of Flickers

“You can discard this card and 1 Dragon or LIGHT monster; add 2 "Dragon Ruler" monsters from your Deck to your hand, except "Spectral, Dragon Ruler of Flickers". You can banish from your GY, this card and 1 Dragon or LIGHT monster, then target 1 "Chasma, Dragon Ruler of Auroras" in your GY; Special Summon it. You can only use 1 "Spectral, Dragon Ruler of Flickers" effect per turn, and only once that turn.”