Have $$ to spend?

Spending money on the game is a great way to support the developers. But what are the best investments to make that give you the best bang for the buck?

## Gems

Gems are a key component to boosting your overall power and making all your fighters more resilient in battle. Even though there is a free way to acquire gems via the "Cut off supply line" event, the rate is so slow that it would take several years to fully evolve them. Chart courtesy of Discord member Gaby.

If you're willing to spend some money, there are a few different ways to purchase gems;

1. (free or paid) Play or sweep the "Cut off supply line" event. Pays off 1 one-star and 1 two-star, or 4 single-star equivalent gems at the highest ("Hell") difficulty level. Free 2x/day, pay 50 diamonds for more, up to an additional 2x/day. **UPDATE**: As of version 1.7.21, this event is only free every three days.
2. (paid) Buy the "Advance Daily Pack" at the Discount Shop for $4.99. This gives you 3 3-star gems or 27 single-star equivalent gems, and can be purchased 1x/day
3. (paid) Buy gem gests at the Chest Shop for 100 diamonds (90 diamonds for additional opens). This gives you 1 1-star gem.

What's the best value? Let's do some math. All the money calculations are done with US $, please contribute calculations for other currencies.

One dollar ($0.99 really, but let's round) can buy 80 diamonds, or up to 140 diamonds if you spend $99.99 for the giant supply chest that contains 14,000 diamonds. Let's assume that you went all out and spent the $99.99 for max diamond amounts and use the $1 for 140 diamonds (or $0.00714 for 1 diamond) conversion rate. I'm also going to assume that you're at the "Hell" difficulty for the "cut off supply line" event and always get 4 gems (1 1-star and 1 2-star). This means:

1. "Cut off supply line" event: 4 gems for 50 diamonds ($0.357) => **$0.089/gem** (rate limited 2x/day - max: 8 gems/day)
2. "Advance Daily Pack": 27 gems for $4.99 => **$0.185/gem** (rate limited 1x/day - max: 27 gems/day)
3. Gem Chests: 1 gem for 100 diamonds ($0.714) => **$0.714/gem** (not rate limited - max: unlimited)

There's a clear signal based on the above, that the faster you want to buy gems, the more expensive they get. The cheapest way is #1, but it also gives you the fewest daily gems. The most expensive way, #3, is by far the most expensive. So, what should you do? It depends on both how much money you can afford to spend and how quickly you want to level up.

Considering that gems are awarded randomly, you can assume that in the long run you will receive equal amounts of each of the 9 gem types (3 red, 3 green and 3 blue) . Let's see how long it would take in each option for all gem types to buy your way to 6 star (9 \* 3^5 = 2187) and 9 star (9 \* 3^8 = 59049) gems - assuming you're starting from 0, and you're also using the free 2 sweeps (8 gems) per day:

To get to 9 6-star gems:

* Option 1: 137 days, $97.36
* Option 2: 63 days, $314.69
* Option 3: 1 day, $1,561.52

To get to 9 gems at max 9 stars:

* Option 1: 10.1 **years**, $2.627.68
* Option 2: 4.6 **years**, $8.427.14
* Option 3: 1 day (really depends on how fast you can tap), **$42.160.99**

Note that the above don't even populate all 12 gem slots, just 9 of them, To get all 12? Double those amounts. You'll have some extra gems left after all the fusing,

Supposed you wanted to do it without spending any money, just with the free sweeps? To get to 6 stars, 174 days. To get to 9 stars, a whopping 20.2 years!

So where does that leave you? You probably don't want an option that takes years. The game does allow you with some investment, or even for free, to get to 6 stars in a few months. For 9 stars, be prepared to spend thousands and do a lot of clicking.