Leveling up

Why is leveling up Phobies impossible after the first few hours of the game?

Every time you upgrade a phobie the requirements to upgrade it again cost more.

The first few hours will obviously be more difficult, but already after a few days it will be easier because you will have different phobies to upgrade.

A tip to get upgrading cards and XP : Always do quests. :smiley_cat::smiley_cat: