Short-Lived Aetherborn

Deathtouch, Lifelink
At the beginning of your upkeep, sacrifice Short-Lived Aetherborn unless you pay {x}, where X is 3 plus the number of Augment counters on Short-Lived Aetherborn, then put an Augment counter on it.
Many aetherborn feel the need to stay alive, no mater what the cost.