Guardian Sliver

If a source would deal damage to a Sliver creature you control, prevent 1 of that damage.
Although this breed is relatively small and weak compared to the rest, it somehow has the innate ability to twist the local Aetherspace, effectively creating a powerful defensive aura that protects it's kin. If I could somehow extract, for use in artificial constructs then our armies would be unstoppable.
- Teliador, Butcher of Angels