My last feedback on the event, since the recipes have popped enough times in the MA, it was a successful event, I still wish one day it will be easier to convert other artifacts sleeping in the inventory into other things we like.
For yet the Spire provides artifacts for previous event buildings, but in three weeks it's quite impossible to get 10 even finishing the Spire every time, not even knowing when these artifacts will come back, then what is the purpose of these rewards for new players that never had the building before ? It would be really attractive to be able to exchange other artifacts for the one we like, so we can make the Spire something attractive again.