Graphene Battery

They are more of a slow release explosion than a battery. Comprised of highly volatile chemicals, it has a singular cycle life and outputs immense amounts of energy. Handle with fear lest we all feel the catastrophic consequences.

Energy:
2
Attack:
0
Health:
0
Type:
Upgrade

Upgraded unit has +4/+0. After upgraded unit is destroyed, deal damage equal to its attack to all friendly units.