===Upgrade===
A Player may Upgrade a defense by [[Controls|pressing Q ]] (by default) and then left clicking on a [[Defense]]. <br>* Upgrading a defense will increase its [[Defense Power]] ratio and [[Defense Health]] ratio.
Upgrading a defense costs different amounts of [[Mana#Green Mana|green mana]] for each upgrade tier:
| Tier 4 -> 5 || 200
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