The only real downside here is that you can only get each effect once per turn, but thats not much of a downside when you can do this every single turn.
I give you pain, you give me information
Note that this is a may effect, so if you kill everything or don't want to exile a Commander that cannot block so they'll just recast it, then you don't have to do it at all
Being able to flip a 15/15 Worldspine Wurm up is a great party trick, but there are other great cards in here like Ashaya, Soul of the Wild, and Aesi, Tyrant of Gyre Strait
By itself, Mishra, Claimed by Gix attacks for 5 damage, in addition to the extra life-drain ability that triggers whenever he attacks alongside other creatures
The raccoonfolk know better, and so should you