Its a great toolbox commander that can fetch wraths (Urza's Ruinous Blast, Ugin, the Spirit Dragon), finishers (Ghalta, Stampede Tyrant, Elesh Norn, Grand Cenobite) or silver-bullet legends (Arashi, the Sky Asunder, Yasharn, Implacable Earth)
Honorable Mentions Emrakul, the Aeons Torn Emeria
They are also notoriously bad at blocking, even worse than goblins
As for Jwari Disruption, it's possible I'm overrating it because I love getting people with Force Spikes and Mana Tithes
While you can use Yuna's mana for anything, she promises upside to the next creature spell you cast this turn by giving it two additional +1/+1 counters
The obvious play is to make an ooze tribal MTG Commander deck, stuff it full of Slime Against Humanity, and then use Nantuko Shrine to create dozens of squirrel tokens each and every turn