There are also ways in Golgari to buff creatures, so if you increase Jenova's power, you can both buff your other creatures more, and draw even more cards when they die
13 Fallaji Dragon Engine As a three-mana 1/3 flying dragon, it might not seem very impressive at first glance, but as the game progresses, if your opponent doesnt have a blocker, you can continuously use your spare mana to hit harder and harder
You won't be able to activate the mana abilities of creature tokens you control on the turn they're created unless they have haste
After we have filled the yard, we can end the game in various ways
It all adds up to make Yuna, Grand Summoner a great commander, while also being innocuous enough to not be a target
Combine it with any kind of fetchland, and youve immediately got a way to ensure youre playing at least one land every turn