This is why you save keys

The anniversary festival has arrived. Now's the time to use those keys you've saved! Who cares if the pity counter resets or gets lowered, you'll be getting epics left and right before you even hit pity anyway. This way, you can reach Eternal (rainbow) and even Twin Eternal without spending a dime. Anyone use up their keys before the anniversary? Didn't think so! For those who recently started, remember to save your gems and keys from now on and use them during anniversaries or other crucial moments. You can use keys for blue chests, purple chests, pet chests, and mount part chests. (Only when it coincides with a mission to open X event chests) It's also okay to open them when there's a rate-up campaign, even if it's not the anniversary.