Cosmic-fueled Sliver

Slivers you control are Eldrazi in addition to
their other types.
All your Slivers have Devoid.
{3}: Create a 1/1 colorless Eldrazi Sliver
creature token. It has "Sacrifice this creature:
Add {c}."
{c}{c}{c}{c}{c}: All your Slivers have Annihilator 1 until the end of this turn.