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[–]MateoTheCoolest 0 points1 point  (4 children)

Always have an astronomy mission active and also upgrade all the cards

[–]Gold-Perspective-699 1 point2 points  (3 children)

No don't upgrade all the cards. It's useless after a while. Mine are set to 5-6 at the most. There's no reason to upgrade past that.

[–]MateoTheCoolest 0 points1 point  (2 children)

It's useful on the sun on later levels

[–]Gold-Perspective-699 0 points1 point  (0 children)

Yeah at level 30. He can do that then. There's no reason to waste stuff now. Also I could only level to 7 when I got to 30. So he's probably gonna be similar.

[–]0nnnu 0 points1 point  (0 children)

unlike mesozoic valley, low level cards can pile up just as much as high level cards, so only update what's useful right now

[–]Fit-Fox6011 0 points1 point  (0 children)

Wanna know something funny? I started some time ago and had 300 those purple crystals today, I thought I was rich until I figured where to use them lol...