What Need to Pass League 1 in Soulkeep?

In Soulkeep league one there are 5 levels to be passed and this is the first condition to pass league 1 but this is not the only one as there is other one that without it even if you passed 5 levels successfully, you would not pass this level.

First one is to pass 5 levels and second one to collect fiends souls as it is in the screen below, there are a specific amount of fiends to pass league 1 which are 2251 Common Fiends and these are very huge amount and I was amazed about this as in 5 levels if they are equal, I have to pass kill 500 Fiends every level.

For Rare one they are less than common as 464 fiends needed to pass league one from rare fiends and for epic it is 38 fiends that their souls should be collected to be able to pass league 1 and for legendary no one required.

As for Defense max Levels if you have a common tower even if it is level 10 that you bought from the market you have to play with level 1 and for rare like common you will play with level 1 whatever the level of your card, For Legendary and Epic you have to play with level two towers and spells.