Second Wind is a defensive card that gives your tower a second chance. When your tower takes lethal damage, this ability brings it back to life with half its health and surrounds it with an invincible shield for a limited time. It can only trigger once per round, making it a crucial safety net for surviving difficult waves.
Description
When your tower would be destroyed, Second Wind activates to revive it with 50% health. It also creates an invincible shield that lasts for a duration based on the card's level, ranging from 10 to 40 seconds. This effect can only occur once per round.
Use
Second Wind is part of a hierarchy of death prevention abilities that activate in a specific order. If lethal damage is incoming, the game checks for other defenses first. Death Defy gets the first chance to activate. If that fails, Energy Shield will use a charge to block the damage. Only if neither of those is available will Second Wind trigger. After Second Wind, Demon Mode and Nuke can also activate if you have their respective Smart Automation labs researched. Note that Smart Nuke Automation also grants 15 seconds of invulnerability as of version 27.3.
Labs — Second Wind Blast
This lab is unlocked in Milestones at tier 3 wave 150. It adds an offensive effect to Second Wind, causing it to clear a percentage of spawned enemies when it triggers. The lab has 4 levels, with each level increasing the percentage of enemies cleared.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 1d 3h 46m | 1,800,000 | 25% |
| 2 | 1d 17h 39m | 3,000,000 | 50% |
| 3 | 2d 7h 33m | 4,500,000 | 75% |
| 4 | 3d 11h 19m | 75,000,000 | 100% |
Labs — Recharge Second Wind
Unlocked in Milestones at tier 14 wave 60, this lab allows Second Wind to recharge after it has been used. Instead of being available only once per round, it can activate again after a set number of waves has passed. This lab has 7 levels, reducing the number of waves required to recharge.
| Level | Time | Cost | Value |
|---|---|---|---|
| 1 | 5d 4h 59m | 550B | 2,000 |
| 2 | 6d 14h 21m | 1,05T | 1,500 |
| 3 | 8d 54m 39s | 1,55T | 1,250 |
| 4 | 9d 23h 10m | 2,05T | 1,000 |
| 5 | 14d 1h 58m | 2,56T | 750 |
| 6 | 24d 19h 29m | 3,07T | 550 |
| 7 | 51d 8h 11m | 3,6T | 400 |