You can only use the 1st and 2nd effect of this card’s name each once per turn.
(1) During your Main Phase: You can Special Summon this card from your hand, then take 700 damage. If Summoned this way, you cannot Special Summon monsters from the Extra Deck while you control this monster, except Synchro Monsters.
(2) If a face-up Dragon Synchro Monster(s) you control is Tributed or banished: You can banish this card from your GY, then target 1 of those monsters; Special Summon it.