I decided not to build the Mage Guild in the central town, even though slow wasn't anywhere on the respawn. Meanwhile, after taking the Dragon Utopia, I had been digging through heroes for slow at the 25k house just to break through triple ГО. As a result, I couldn't break the Cool Unicorns with +5 and +6 All in the treasure after 3 ГО. And of course, I immediately got smacked in the final battle without mass slow and with advanced air. Just a GENIUS. Brilliantly played.
PS: obviously there was SLOW in the central town's Mage Guild