First, there's a lot of variance
destroy it, then, if it was a LIGHT monster, both players send as many cards as possible from their Extra Deck to the GY, but not more than the original Level/Rank of that destroyed monster
Thunder + Dragon Combinations that use this card The following cards can be created during a Duel via Fusion by combining "Thunder Dragon" with one of the listed cards
6 Oh Tokenbaum
As an example, Emchompite says that cards that were included within Japanese sets, like the Secret Rare Yveltal EX from Best of XY, but as promos in English, are usually more expensive in Japanese just due to the nature of their release (i.e., having to pull the card from a pack vs a guaranteed promo card in a product)
While accelerating from 1 to 3 doesnt do much, hitting max speed unlocks additional abilities on certain cards