Werebear is a mana dork, and its power/toughness get better when youve hit threshold
While The World Tree and Chromatic Lantern can help , you also need to draw those cards to use them, something easier said than done
Rhino really changes a race dynamic and will shift it from a losing one to a winning one more than almost any other proactive card for the mana
Klothyss Design Klothys's Design scales with your devotion to green, so hypothetically it can grant +20/+20 to the team
Mystic Confluence Mystic Confluence provides a lot of options for not too heavy a cost
Primed to boost "exiles matters" Commanders like Prosper, Tome-Bound, Faldorn, Dread Wolf Herald, and Pia Nalaar, Consul of Revival, it also plays well with Madness/Mayhem, Delirium, and reanimation effects