Some units have a limited lifespan, shown by a skull icon 
. At the start of the owner's turn, the unit's lifespan is reduced by one, and it's destroyed when it reaches zero.
Blockers with lifespan are vulnerable to chill, since freezing a blocker that's about to die anyway is equivalent to dealing damage. Similarly, absorb denial units like Bloodrager and flexible attackers like Scorchilla can reduce a lifespan unit's value as a blocker. For these reasons, it's sometimes better to attack with a lifespan blocker on its last turn even if the defensive value would be greater.
Units with limited lifespans
Unit table
| Name | Type | U/S |  |  |  |  |  | # |  |  |  |  |  |  |  |  |  |  | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vile Doombot | Colorless | Unit | 0 | 0 | 2 | 1 | 3 | ||||||||||||
| Barrier | | Unit | 1 | 1 | 20 | 0 | 1 | | | 1 | |||||||||
| Thermite Core | | Unit | 1 | 1 | 4 | 1 | 1 | 8 | |||||||||||
| Doomed Drone | Colorless | Unit | 2 | 1 | 10 | 1 | 1 | | 4 | ||||||||||
| Nivo Charge | | Unit | 2 | 1 | 10 | 1 | 1 | 1 | |||||||||||
| Plexo Cell | | Unit | 2 | 2 | 10 | 0 | 4 | | | 1 | |||||||||
| Oxide Mixer | | Unit | 3 | 1 | 4 | 1 | 2 | 4 | |||||||||||
| Fission Turret | | Unit | 4 | 1 | 10 | 1 | 1 | 1 | 5 | ||||||||||
| Grimbotch | | Unit | 4 | 1 | 10 | 1 | 2 | | 1 | 4 | |||||||||
| Innervi Field | | Unit | 4 | 2 | 10 | 0 | 3 | | | | 3 | ||||||||
| Doomsplitter | | Unit | 5 | 1 | 10 | 1 | 3 | | 1 | 5 | |||||||||
| Frost Brooder | | Unit | 5 | 2 | 4 | 1 | 2 | 6 | |||||||||||
| Kinetic Driver | | Unit | 5 | 1 | 4 | 1 | 1 | 1 | 6 | ||||||||||
| Doomed Wall | | Unit | 7 | 1 | 10 | 0 | 4 | | | 3 | |||||||||
| Chieftain | | Unit | 8 | 2 | 1 | 10 | 1 | 7 | | | 2 | 3 | |||||||
| Doomed Mech | | Unit | 9 | 2 | 10 | 1 | 5 | | 2 | 5 | |||||||||
| Aurb Magnifier | Colorless | Unit | 12 | 1 | 6 | 9 | 6 | ||||||||||||
| Gauss Fabricator | | Unit | 12 | 4 | 1 | 1 | 10 | | 8 | ||||||||||
| Thunderhead | | Unit | 15 | 5 | 1 | 1 | 1 | 11 | | | 4 | 3 | |||||||
| Defense Grid | | Unit | 16 | 3 | 1 | 1 | 7 | | 7 |
Unit panels
