Sustain

A  tool is a type of ability that allows agents to replenish their health after taking damage.

Summary
A sustain ability is used to 'undo' or counteract any damage that has been dealt to them. This includes anything from small chip damage to resisting lethal damage that would otherwise result in the player's death.

Heal
A heal is a sustain tool that restores an agent's health. It cannot restore any shields, though some allow you to overheal so that you can reach 150 effective health even if the player's health was already at 100 before the heal.

Ally heals
Ally heals can be used on any of the casting agent's allies. The ability may or may not include the possibility for the caster to heal themselves.



Self-heals
Self-heals only affect the agent who cast them.





Revive
A revive is a sustain tool that allows the player to resist or come back from taking lethal damage that would otherwise result in their death.