Well, to begin with, Phelldagriff is such an exception that there is no substitute in these colors
However, unlike 'Phelldagriff the Immovable,' it can't move creatures with defender, so you'll often be disappointed if you think of it as a second Phelldagriff
Naturally, you'll want a deck full of angels, demons, and dragons to back Kaalia up
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.) Unlock the potential of your card collection
Treasures are useful because they can accelerate your mana in a pinch, or you can use Magdas payoff effect to find expensive artifacts or Dragons to close the game with, opening up a cool token play pattern that is a breath of fresh air after years of Krenko and Purphoros, God of the Forge combo killing tables by generating a zillion goblins