Key Rewards from Milestones
Seeing as we can get Relics, Lab Unlocks, Gems, Stones and Skins from Milestones, would it be too ridiculous to get 5/10 keys from reaching Wave 7,500 and 10,000.
It’d help mid game players who aren’t able to reach the Legend League, and still be a challenge to get some high wave runs on each tier.