Even with the Dragon of Mount Gulg artwork not being strictly new, its still great to see the artist included
Put a +1/+1 counter on that creature
If you look throughout Magic 's history you will notice that there are a lot of cards that became playable because they could transcend color limitations
Some cards will make you a 'lil bit safer, like Sliver Hivelord, Darkheart Sliver + Hibernation Sliver, Sedge Sliver or Crypt Sliver, Diffusion Sliver, Ward Sliver, Root Sliver, Frenetic Sliver (in last case scenarios) , Crystalline Sliver, Pulmonic Sliver, Asceticism, Privileged Position and Steely Resolve
They can't try to remove the card from your graveyard to stop you from paying the cost
Double Shaman token treasures, some card filtering, and then a way to make hastey copies of your creatures (that you dont care about being blocked and dying) can really accelerate the decks gameplan