I appreciate that you take part in Keeper of the Grove. You must prevent the crystals from being stolen by opportunistic forest creatures. To stop crystal smuggling, your group need design unique nature guardians. You can even set up barriers to protect your forest from intruders. Your protection of the crystals is paramount. Have some luck.
-space – speed up/ down -enter – start the wave -esc – pause
protect the crystal by building defenses on the road