You will need the following items:
-Golden Shovel (get it just digging around 30 piles)
-Ice Staff, prefer upgraded
-Include Stamine Up in your 4 basic perks

The Ice Staff parts appears especially when snow time comes.

The red piles (increase the perks slot) are only viewables with zombie blood, so You can make it putting out the flame of 3 chariots arround the excavation area using the ice staff.

The red pile won't change the place till you get it.

If you find and get 1 red pile, you must to pass the round so you get another one, maximum 4 red piles.

NEVER TAKE THE DOUBLE TAP (by Wunderfizz) IF YOU HAVE NOT GOTTEN 8 PERKS. Double tap will locks one slot. The 9th perk (Double Tap) should get using the reward chest (coffer).


The active Wunderfizz place can check it looking the sky. Look at generators direction and find a white ray rain to.



Even getting down and lose all perks You will keep 8 perks slot so you can buy them again.

After you get the golden shovel when you grab the zombie blood it will appears the red pile in random places.

Map

a). Laboratory Area

1. Way to generator 2:
2. Close wall Remington



b). Generator 2 Area

3. The rear entrance where tank stops
4.The corner where shield part appears



c). Way to generator 3

5. Inside the Fire cave
6. Close the B23R wall pistol

7. Generator 3










d). Excavation Area
8. Beside the chest
9.
10. Generator 4
11. Generator 5 close the chest


12. Generator 6










13. The tank way
14.
15.
16.

After getting the golden shovel, when you take zombie blood must to check fast the possible red pile spots. According to the area where you are, you need to run to the closest points and check.

Except rain time, you can make zombie blood using the ice staff

Videos: (If you can't watch it large or HD, link to YouTube Channel:
https://www.youtube.com/channel/UCMHbk24COao8LVlQRLBo02Q
I recommend watch full screen and HD)




9 perks at round 16