I think this guy will shake up Esper control and give you a solid line of vigilant defenders, card draw, and a powerful heavy hitter
Also, if you use your turn casting something like a dork, then you cannot counter the counter, it's very strong there
Its hard looking at a card like Chulane and finding faults, but if you needed to nit-pick, you could criticise the mana cost for requiring three different colours, or the fact that it doesnt come with any ways to reduce mana costs for creatures you play
Nyx Lotus and Nykthos, Shrine to Nyx are both in this list and both can produce mana equal to my devotion to Black
Nevertheless, the deck itself comes with a multitude of ways to manipulate the top card of your Library to give you the best response to any situation you may face