The downside is, unless you actively want to be dumping your hand into the graveyard, you need creatures with high power in order to make Greater Good worth it
Spreading Seas ($0.35) Its generally a good idea to include some form of land hate in your Commander decks, to help deal with lands like Maze of Ith or Field of the Dead
3-in-1 Card Storage Box: The AFIING card deck box system offers ultimate convenience with 2 deck boxes, a dice/token box, and a cover/mat all combined into one
Its just the cherry on top that most of your fixing cards can offer a lot of toughness to the cause
A 5/4 with first strike for five is already a good deal, but her follow-up ability is even better
However, Murktide Regent is in many ways a homage to creatures from back in the day, as the dragon simply is just a very big creature