Though there are too many variables with the standard card pool included to be sure, Im already thinking of decks and combos that might show up in competitive play
When they pay 2 mana and one card to kill 2 things you are very far behind
Zilortha lets your non-Human creatures assign damage as though they werent blocked, which often turns a developed board into lethal out of nowhere
For example, here on Jundthe green, black, and red piece of Alara that brought us the There's also another ability that's next to this symbol and talks about chaos ensuingwe'll get to that in a second
[20] Icatian Crier comes with an ability that says: Put two 1/1 white Citizen creature tokens into play
This is already powerful, but Ragavan has the additional benefit of having a two-mana dash cost, meaning that, for two mana, you can cast Ragavan with haste, and he returns to your hand at the end of the turn