No only do you have to pay for the unlock, but you have to earn it by completing the mission afterwards. This *may* be fine if it was always available, but making it a limited time this on top of the purchase and game restrictions is too fucked up
What if someone buys it and cant complete the quests? Some of the requirements are pretty intense for YOU to do in a TEAM game
How can you complete the quest when the select champs are fought over by multiple people on both sides? Bans?
Just give missions. Fuck the limited time, very select champion use, $$ exclusive stuff