Just played a 3 hour game with this deck vs my artifact ub Wurmcoil Engine deck, this won by milling the ub deck out and sphere of saftey kept white deck from EVER being attacked (2 on field kept the tax at 15-22 mana fr most of game) nykthos produced an average of 9 mana per tap and as much as twelve. The heliod produced probably 50-60 tokens but the need to attack into a field of 9-12 artifact creatures as big as 13/13 kept the token count in check, it was attack or be killed by Tezzeret, Agent of Bolas the prior game however was fairly normal and the 2 Vedalken Certarch kept anything from happening that a doom blade couldn't fix before the wurms were unleashed