I agree that it's not an exciting spell. Does Nature need a rare city production boosting spell? Are you likely to have a game where it made at least as big a difference as Gorgons or Blizzard? If not, maybe scrap it and replace it with something more interesting.
Does anyone have an "I wish Nature Rare had a <combat global spell (boosting your units or hampering the enemy) or maybe a city enchantment that summoned a few random Nature units in combat.>?"
Does anyone have an "I wish Nature Rare had a <combat global spell (boosting your units or hampering the enemy) or maybe a city enchantment that summoned a few random Nature units in combat.>?"