Evasive means that only other characters with Evasive can challenge her, but it wont protect her from becoming the target of actions, so dont think of it as a free pass
Goofy Daredevil has the Evasive keyword
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Lyse Hext's second ability)
This will be a particularly strong card in location-based decks, as you can pull whatever location card you want to right out of your deck
As proxy cards are made from actual cheaper bulk common Magic the Gathering cards, they will still have the same back as the normal cards
As another example, if at the start of turn six you have five cards in your inkwell and hold a two-drop, a three-drop, and a five-drop, then just cast your five-drop and dont add anything else to the inkwell at this point