1 Tuner + 1 or more non-Tuner monsters Once per turn: You can discard 1 card, then target 1 card your opponent controls; destroy it. If this Synchro Summoned card is sent from the field to the Graveyard: You can draw 1 card. You can only use this effect of "Coral Dragon" once per turn.
Well, in some case, it is better to use this card to destroy thing such as necrovalley. A deck that oriented around level 6 synchro might be using this card along with brionac. It give you more option for a specific condition.
Also, being a tuner mosnter itself, you might be able to summon a level 10 synchro related monster by using it along zephyros and such.