Ok, now you've earned some glint, how can we use them ?
First take a look at the right side of the screen at the battle menu. You can check your glint balance, and next to it there is the season end loot. And above it, there is the shop button. Simply click it to go to the glint shop menu.

Now you should be arrived at above page, where you are offered with many option for the glint shop. There is rarity draws on the above, where you can buy current reward cards with specific rarity from common, rare, epic, and legendary.
Next there is loot chest from minor, major, and ultimate.
On the below of the loot, there is exclusives which contain tittles, and last there is resources that contain merits, energy, and potion.

There is glint cost for each item and you can click on that glint cost of item you want to buy, next there will pop out the number you want to buy and glint total needed. As you confirmed, the purchase is succesfully done.

Optimizing the Glint on the Shop

Okay, let's talk about the main topic, how to optimizing the use of glint ?
For me, it's depend on your goal and your current situation.
As for me, my goal is to get certain cards on certain rarity (rare), I prefer to spent my glint on the rare pack, just like the previous reward set where the summoners are all on the rare pack, I tried to max out of rare pack to get the most of them.
But, if you don't have interest on the reward cards, you can use for others, such as trying to pull the jackpot from the chest, or try upgrade your gladiators with more merits then buy the gladiator pack. You can chose energy as well to max out your SPS income from the battle.
So yeah, it's all about your own goal that you want to chase, the glint are offers many option for you !

Final Words