Overview
Drain is a skill obtained by collecting upgraded 
Dweller Cards. Tough Drain is received from obtaining an Elite Dweller Card. Stunning Drain is received from obtaining a Super Dweller Card.
Just like all Card skills, there are no alternative colors.
The timing for the Action Command is right before the skill deals damage, right after the camera stops turning.
Succeeding the Action Command performs an 'Critical!' hit, increasing the amount of 
Damage dealt.
Usage
Drain deals a good amount of Damage to the target while also 
Healing the user by half the amount.
Compared to other damage dealing skills such as Stone Arm and Evil Impact, Drain focuses on self sustenance, healing the user by a small amount for each use. Keep in mind that the amount Healed depends on the Damage dealt, so targets with high 
Defense will provide less Healing than targets with less or without.
Drain is useful in battles where healing with items becomes unfavorable, such as trying to reserve healing items or battling Bedrock. Drain is also very useful in dungeons such as the Overgrown Grotto, where shops and inns are absent and HP Restores are disabled. In general, Drain provides an alternative way of healing other than the use of items.
Notes
- The amount
Healed from Drain is half of the Damage dealt, rounded down.
- Even if the target's Health is lower than the Damage dealt, you'll still heal half the Damage dealt.
- Even if the target's
Trivia
- Drain is the only skill that Damages a single target while Healing the user, provided that the skill deals Damage.