1 Dragon-Type Tuner + 1 or more non-Tuner Dragon-Type monstersMust be Synchro Summoned, and cannot be Special Summoned by other ways. When this card is Synchro Summoned: You can target up to 2 other cards you control; destroy those targets, and if you do, for each card destroyed, this card gains 1 additional attack during each Battle Phase this turn.
Hmm... Synchro summon this, then activate it's effect, destroy at least 1 spell/trap( like wild tornado or an equipped blast with chain or an activated widespread dud) then after that activate chain whirlwind, destroy 2 s/t your opponent controls... Woah... That is some combo and you got an additional attack...
And what's the Tuner you are going to use for that?
This card need some preparation. After all, this otk required at least 3 card in the field to fulfill its potential otk ( material + card to fulfill the condition ), but it is very vulnurable to trap etc. A single econ, or even sphere kuriboh will waste your effort