Melody of Awakening Dragon can search out 2 powerful Dragon-type monsters from your deck which you can then special summon immediately with The Flute of Summoning Dragon, but remember that you need Lord of D. on the field to activate The Flute of Summoning Dragon.
Special summon the monster you search with Kidmodo Dragon, or activate Melody of Awakening Dragon when you already have a powerful Dragon-type monster in your hand and then discard Kidmodo Dragon to summon it. If you searched a Blue-Eyes White Dragon you can special summon it with Kaibaman
Strictly if you begin the game with 4000lp can be searched rainbow dragon with card of souls
My BEWD-Felgrand deck doesn't need this searcher. Man, I'm quite disappointed with this reward (and other LDs' level 45 rewards in general). Why don't they just give us another Blue-Eyes monster (like Dragon Spirit of White)?