When a unit goes to the enemy void, it gets Voidbound.
Infiltrate: Kill an enemy unit.
Card sounds may differ from in-game as they get updated.
Infiltrate - The special ability of a unit with Infiltrate occurs the first time that unit hits the enemy player. It doesn't work while the unit is on defense, such as when it is attacked by a Relic Weapon.
Voidbound - Cards with Voidbound cannot leave the void.