I think it does what you'd probably want an X spell to do. While it's (Almost always) better than
braingeyser, that's not saying a lot. Untap X lands would be the only change I might make, which could be a nerf but also could make the card more interesting, if you've got bouncelands or
mana flare effects or somesuch.
I've got a little mini fight club:
vs
I'd been experimenting with what it would take to remove planeswalkers from my cube. I'd been disappointed with so many that it might not be a ton of a stretch anyways, and now with sagas to work with (once Cajun releases the dominaria patch for magic set editor) I've got more options than I would have before. Ajani, Born leader was always meant to be a replacement for
Ajani Goldmane, but I'm not sure I succeeded where I wanted to. His plus ability is useful, but it overlaps so much with the minus, and it turns out lifelink can be a pain. As well, the ultimate is a neat designer idea, but it doesn't really play all that well or read that well either. I think it's still an improvement on goldmane (who might as well have fading) but I think I can do better.
That being said, most of my drafters thought I was insane for making Call of the Crusade. It's got some nice mechanical overlaps, as white has both a prowess thing and a +1/+1 counter thing going on, and it's certainly strong, but is this a 5cc card?
Dictate of heliod was in my cube a while back, and I took it out for being unnecessary not for being too powerful.
What do you guys think?