You want to make a big board of creatures and swing with them, either selecting that your opponent doesnt block in order to finish them off or using Odrics ability to pick how they block to serve as pseudo-removal
Green has been good for so long, I wouldnt be surprised if most of todays players didnt realize that green was famously considered the weakest color by a large margin in the early days of competitive Magic, a reputation that persisted for many years
Krark-Clan Ironworks and Ashnods Altar are both incredible, as theyre free abilities that, thanks to their status as mana abilities, go even faster than a Krosan Grip
With Kardur, Doomscourge be patient enough to let your opponents play down some heavy hitters then you get maximum impact from the ETB that goads all opposing creatures
If youve got less to invest in the game, I suggest you play Standard
March of the Machine will add many more ETB creatures in MTG 's other colors, so all decks will benefit