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
There are decks that like it, though, like General Ferrous Rokiric and Firesong and Sunspeaker
Sadly, a number of the former big-ticket items from this set have been banned in a number of formats
These are the rarest cards that can be pulled from packs and products, with a very low pull rate
Should you push graveyard synergies like Kroxa, Titan of Deaths Hunger, or perhaps build around something like Collected Company
This is a mana doubler disguised as a dragon, and a persistent token generator at the same time