Kyurem

Here we can see the rare and elusive Kyurem, a silent dragon who seeks to restore balance to the world.
Ahem...
Kyurem (also called Kyuremu or Kyu) is a silent silver-black ice dragon, with both a quiet attitude and a habit of doing what he wants, despite what anyone else might say. He is, alongside Reshiram and Zekrom, part of the Energy Trio.