So the field is 4 Mountains 1 Valakut, the Molten Pinacle, 2 Arid Mesa. I crack 1 Arid Mesa putting a Mountain into play, will Valakut trigger in order to check if there are 5 other mountains in play giving me a chance to crack the other Arid Mesa, putting another Mountain into play? Which would give me the Valakut activation for both mountains.