I decided not to build a Guildhall in the central city, while there was no slow anywhere on the map. Before that, I was digging up heroes with slow in the 25k houses after taking Utopia, to break through the triple Guard. As a result, I failed to defeat the Elite Unicorns with +5 and +6 All stats in the treasure after 3 Guards. And of course, I immediately got hit hard in the final without mass slow and with advanced air units. Simply GENIUS. Brilliantly played.
PS: obviously, there was SLOW in the Guildhall of the central city.