Summary
Stardew Valley’s1.6 Update brings a lot of fun new features, including the Desert Festival. The Desert Festival occurs on the 15th, 16th and 17th of Spring. This festival brings a lot of fun changes, including new Skull Cavern challenges.
When you enter the Skull Cavern duringthe Desert Festival, you have a chance of coming across a Calico Statue on each floor. When you give this statue oneCalico Egg, you have a chance of getting a Buff, Debuff, or Neutral effect. Below, you’ll find all Calico Statue Effects Ranked.

15Buff: Calico Eggs
100 Calico Eggs!, 50 Calico Eggs, 25 Calico Eggs, 10 Calico Eggs.
The main reason to take on challenges during the Desert Festival is to getCalico Eggs, which are a form of currency during the Desert Festival. Therefore, 100 Calico Eggs! is the best buff that the Calico Statue can give, followed by 50, and so on.
At the Desert Festival, you can use your Calico Eggsat villager shops,the Calico Egg Merchant (where there will be new items every day), and The Traveling Merchant.

14Buff: Full Refresh!
Full refresh is a fantastic buff because it fully restores your energy and health. This can save you when you’re in a pinch, and increase your chances of succeeding in Skull Cavern challenges.
However, if you’re fully stocked on food or get this buff earlier in your Skull Cavern run, it’s a little less useful.

13Buff: Monsters Do Less Damage
With the Buff Monsters Do Less Damage, Monsters will do 25% less damage, which is more helpful the further you delve into the mines. Some of the monsters in the Skull Cavern can kill you quite quickly, and the more dangerous foes appear the deeper you go.
If you have a lesser weapon, this buff is amazing. Once you have the Lava Katanaor Galaxy Sword, it is less needed.

12Buff: Speed Boost
If you get the Buff Speed Boost, you gain +1 speed for five minutes. This buff is lower in ranking because you can get the same buff from drinking a triple-shot espresso.
Earlier in the game, when you don’t havea coffee machine, or coffee plants, this speed boost is great. However, once you’ve acquired those items, it’s more or less useless.

11Neutral
This one is pretty self-explanatory; nothing happens, good or bad. You still spend oneCalico Egg, but that’s about it.
For every Calico Statue activated, you gain one “Egg Rating.” You can submit your egg rating to Gil to earn prizes, so even though you’re spending an egg, you’re gaining a +1 Egg rating.

10Debuff: More Ghosts
More Ghosts Debuff means that 15% more Carbon Ghosts will appear, and you have a +1 overall monster spawn chance. Carbon Ghosts have a base HP of 190. Hitting them several times should kill them.
More Ghosts is one of the easiest Debuffs you may get; Ghosts are persistent, but not incredibly hard to defeat. Having more of them is a nuisance, but it’s not too overwhelming.

9Debuff: Mummies Have Become Angry
The Debuff Mummies Have Become Angry turns Mummies into dangerous Mummies. The base HP of a regular Mummy is 260, and the base HP of a dangerous Mummy is 445, which makes them harder to kill, and can also do more damage.
Both regular and dangerous mummies have a defense of zero, and a speed of two. Overall, dangerous Mummies are not a lot worse than regular mummies.

8Debuff: Lose More Eggs When Knocked Out
This Debuff is not one of the worst ones; of course, losing moreEggswhen you’re knocked out isn’t fun, especially since Calico Eggs are the currency at the festival. If you trigger this Debuff and pass out, you’ll lose 50% of your Calico Eggs.
However, if you don’t pass out, this Debuff doesn’t affect you at all. You’ll leave with all your Calico Eggs, and you will still gain plus one egg rating.

7Debuff: More Serpents
This Debuff is very similar to More Ghosts, but of course, with Serpents. Serpents are faster, and a bit harder to kill than ghosts, so having more of them can feel threatening.
With this Debuff, 15% more serpents will spawn, and there will be a +1%overall monster spawnchance. Serpents have a base HP of 150, are relatively fast and can deal a decent amount of damage.
6Debuff: More Bats
The More Bats Debuff will increase the chance of bats by 15%, and add a +1 to all monster spawns. There are a variety of bats, including Bat, Frost Bat, Lava Bat, and Iridium Bat.
Iridium Bats are the reason this Debuff is strong. They have an HP of 300, a speed of 3, and a base damage of 30.