MahBoiii - This is so Squee. I do feel like this will almost always be a token engine, but the other abilities do provide depth if needed.
Cardz5000 - I like this for play mode, but I definitely get a feel. It also seems like it would be very common to not activate abilities of this every turn, which is an interesting play switch.
netn10 - One of the things I think Planeswalkers should always provide is a target for attacking, and I don't think this really qualifies. I think a more asymmetrical 'ultimate' would be helpful.
|Katamari| - Excellent way to uplift Sisay. I wasn't sold on the vehicle specificity at first, until I realized the flavor connection.
mirrodin71 - I feel like this Jhoira has to have a lot of stuff going on to make it effective in all modes. And that minus definitely makes it feel like it needs an exile ability on the other abilities to function well.
Gerrard's Mom - I am mightily confused as to how this would play out. If unchecked, I feel like it could end up being very confusing, with a lot of things appearing and disappearing all the time.