This is a Warhammer 40000: Deathguard, Lord Felthius and the Tainted Cohort

The kit is comprised of 26 plastic components, with which you can assemble one Lord Felthius, Lord of Contagion, and three Blightlord Terminators. The kit is supplied with 4x Citadel 40mm Round Bases. These models are push-fit and do not require glue to assemble.

Note this kit comes supplied in plain packaging from the supplier