Thunder Dragon is to cycle your deck out, meaning you will have less cards in it when you draw because you used thunder dragon's effect to get rid of two extra cards in your deck already. I'm pretty sure I'm right. And in case your opponent uses Fusion gate, free Fusion summon for you! Or you can use the effect one at a time to throw two dragons into the grave for bazoo.
Hi there. 11 Star dropping some knowledge: Skull lair combos with Thunder Dragons, Storm + set Wild Tornado for simultaneous monster and backrow removal.
It still is strange, i mean yeah you can thin out your deck, but in the end you draw one card which is practicly unusable. Also, i am lv 9 right now and I have not seen once a duel with Fusion gate on the field