Hextech Chests are so troll
So here's the story.
I played games and got 3 key fragments. I opened a chest and I got Arcade Riven skin shard.
I didn't have enough orange essence to upgrade the skin to permanent. I started to play games like a mad man so I would get more key frags to get enough orange essence for the upgrade.
Then I finally reached 3 key fragments after playing about 50 Ascension games. I opened the chest and I got Dark Valkyrie Diana skin shard. I disenchanted it, so I'd get orange essence. It wasn't enough, and I only needed 70 orange essence to upgrade Arcade Riven skin into permanent skin.
Then I started to play ranked and ARAM, so I'd maybe get key fragments faster. After playing ARAMs and ranked games, I once again reached 3 key frags.
I opened the chest and I got Malphite champion shard. You can't get orange essence from him, only blue essence.
Now I'm still lacking 70 orange essence and I have no key fragments. And Arcade Riven is still waiting for a upgrade.
