So on first glance you're right, Mishra seems like an awful choice to pick as a commander, but there's something really neat to be reaped here if you look at the ability really close
Why dont we take this time to put our feet up, forget about complexity creep, and rewind back to a simpler time by looking at some of Magics best vanilla creatures
This effect lets your Saprolings survive damage-based board wipes like Pyroclasm, and lets them block the biggest of ground-based creatures without taking a scratch
The decks span four of the most popular archetypes: Slivers, Eldrazi, Enchantress and Superfriends
Here's some of Wizards' explanation for the banning: The last turn-three deck that remained was Dredge...Dredge is not known for being fun to have around
Its a nice budget inclusion for your mana base