Here's a list along with approximate preorder pricing: Call the Spirit Dragons ($20) Dracogenesis ($20) Stormscale Scion ($20) Teval, Arbiter of Virtue ($10) Shiko, Paragon of the Way ($10) Betor, Kin to All ($10) Neriv, Heart of the Storm ($8) Urnei, the Song Unending ($8) Tarkir: Dragonstorm is filled with many powerful Dragons and Dragon cards worth more than the price of a Play Booster (at least during prerelease)
Graveyards, food, and offspring all seem to be central themes for the colour
Urzas Cave is again less relevant in EDH than in Modern, where the land subtype is much more relevant
While skipping one-drops is doable, especially in slower decks, not being able to play three-drops as well means that playing Gyruda, Doom of Depths as your companion essentially means that you're guaranteeing you'll cast a maximum of four mana worth of spells (two two-drops) across the first three turns of the game, which is certainly too slow for older formats like Modern and Pioneer, and likely too slow for Standard as well
Since it was so iconic during MTG's early days, it's easy to see why it's been able to maintain a lot of its value
Or download the pdf and do it yourself