Even if you don't have a Rat to regenerate, it can still tap for colorless mana
Giving your opponent a chance to draw seems like a big problem
Flying around Hurska you can see several little sheep/bumblebees buzzing around, which is almost better than the Bear themselves
Circle of Life taps into the Sing Together mechanic, so its 8-ink cost can be circumvented, especially with help from a willing teammate
Fortunately, I had just the team member up to the task: Michael "Hindy" Hinderaker
Some of the vast range of abilities include effects like: Banish a character or item Damage or heal a character Draw cards, or look at the top few cards of your deck Gain Lore or steal your opponents Lore Exert an opponents character or ready one of yours There are many more, and different ink colors tend to have more of certain abilities