Indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.)
When Barbed Servitor enters the battlefield,
suspect (A suspected creature has menace (This creature can't be blocked except by two or more creatures.) and can't block.) it.
Whenever Barbed Servitor deals combat damage to a player, you draw a card and you lose 1 life.
Whenever Barbed Servitor is dealt damage, target opponent loses that much life.