1 "Destiny HERO" monster + 1 DARK Effect Monster During either player's turn: You can discard 1 card; send 1 "Destiny HERO" monster from your hand or Deck to the Graveyard, and if you do, all "Destiny HERO" monsters you currently control gain 200 ATK for each "Destiny HERO" monster currently in your Graveyard, until the end of this turn. You can only use this effect of "Destiny HERO - Dangerous" once per turn.
If used in an all Destiny Hero monster deck, using its effect will make its attack at least 2600 attack (2 from the fusion materials, and 1 from the effect, or 2 if you send two D Hero monsters which will make him 2800).
Increases the attack of other D Hero monsters you control as well.
Effect only lasts until the end of your turn.
Activating its effect can be costly, and potentially mill yourself faster than your opponent.
Except it wasn't Destructive Guy in Japan, either. It was Deadly Guy. Destructive Guy was clearly the preliminary English name before it was finalized. Either way, personally, I like Dangerous the most of the three, but all three are fairly weak names.
Getting a lot of win from this because people just ram their monster to this without even reading his effect