Zlvark, Slivdrazi Titan

Eminence — As long as Zlvark is on the battlefield, or in the command zone, Slivers have Devoid.

Eldrazi are Slivers in addition to their other types. Slivers have Ingest.

{c}: Create a !/1 Eldrazi Sliver Scion, it has "Sacrifice this creature: Add Colorless." Only activate this ability if you control five or more Slivers.

{c}{c}{c}{c}{c}: All Slivers you control gain Annihilator 1 until end of turn.