If a Level 8 or higher Dragon-Type Synchro Monster is on the field, you can Special Summon this card (from your hand). You can only Special Summon "Red Nova" once per turn this way. If this card is sent to the Graveyard for a Synchro Summon that uses 2 or more Tuner monsters as Materials: You can Special Summon 1 FIRE Fiend-Type monster from your Deck in Defense Position.
Special Summons itself from your hand / Special Summon by its own condition once per turn / Special Summons from your Deck
It's nice that she gets a monster into the field after you bring out Red Nova Dragon.....but why in Defense Position? That doesn't really help, unless we still can normal or special summon something else to bring out another Synchro or an Xyz.