Hidden Ajani

If you look carefully at Shards of Alara cards, you can sometimes see planeswalkers strolling through, interacting with the scenery. Or, in the case of the three "Soul's" cards, busting things up. Observe!

In Soul's Fire, Ajani is seen creating a fiery avatar of himself, an incarnation of his passion and fury.

In Soul's Grace, Ajani is again working from the background, bestowing his pridemate with a ghostly avatar of himself.

Finally, in Soul's Might, Ajani uses his otherworldly power and wisdom to imbue a cat warrior with more inner strength.

Of course, those aren't the only cards where Ajani can be spotted...