I'm leaving the Wikipedia link here
No energy cards are included in standard packs (unlike English packs, which always include an energy card)
(2) During the End Phase: You can target up to 2 Asutra monsters and/or Asutra Traps in your GY and/or banishment
Whether your hand is stuffed, or whether youre out of cards to draw, its a shining example of a game-changer
That does not mean, as we have explained before, that the metagame is static, but if you invested in Regidrago when it first came out (like 4 or 5 years ago), you would have had in your position a tier 1 or 1.5 deck ever since
Most of the time when Kaiba attacks with that monster, he announces "Go, Blue-Eyes Ultimate Dragon!", followed by "Neutron Blast!" When Kaiba Summons "Obelisk the Tormentor", a cut-in frame of Kaiba briefly appears, and he announces "It's no monster