Even though she's only been in print since we visited Kaladesh , she's the third most played Simic colored leader, and there are more Rashmi decks registered than Edric, Spymaster of Trest
I also really like Bear Umbra, which helps protect Samut from destroy effects and in the meantime untaps your lands when you attack
I have chosen mostly (but not all) cards which are specifically good in all-Zombie decks, mostly (but not all) based on their potential in Commander, and mostly (but not all) with present day performance in mind rather than historic achievement
Dina, Essence Brewer, the commander of Witherbloom Pestilence, allows you to draw a card the first time that you sacrifice a creature each turn, and can be tapped down to sacrifice a creature in order to gain life and +1/+1 counters equal to the power of the creature you sacrificed
Some players wondered if they should have just renamed or re-illustrated the card
Its a creature, so it is relatively easy to remove