New Upgrade/Research: Spike Traps

[next pollen]

This allows players to research a new upgrade that is similar to the wall and would also have three research levels. Once the research is finished, miners/enslaved miners would get a new action button.

The Spike Traps are untargetble, slows, and inflicts a uncurable DOT that deals 3 damage per tick and lasts for 5 seconds against enemy combatants. It also inflicts damage when enemy combatants step on it.
I.e
2 dmg against heavies
5 dmg against light

Above I have mentioned that they are untargetble, that is because the only way for enemy combatants to destroy them is by stepping on them a number of times.
I.e
If research level 1: 10 times
If research level 2: 20 times
If research level 3: 30 times

It takes 5 seconds to build up and players can have up to 5 Spike Traps at a time in the map and has the cost of;
100 gold
50 crystals

The cost for each research level is as follows:
Level 1:
50 Gold
Level 2
75 Gold
25 Crystals
Level 3
100 Gold
50 Crystals

Amendments:
Added DOT damage per tick and period
Added length of time for it to build up
Added research cost through the levels
Decreased Crystal Cost

[timid drum]

It's a good suggestion but I honestly don't think I'd use it much

Unless devs finally add more slots

It's better as a base defensive

And most people play offensive these days but then again it is a good idea

That could annoy most people

[obsidian hatch]

so your telling me:

if I were to place Multiple Of this in the middle. (Assuming I have taken the middle in the start of the game.)

And , Retreat , Letting The Enemy Take The Middle.
And Get Damaged.

then perhaps.