Goatboy here with the single best Warhammer 40K unit to pick up in 10th Edition, for each Space Marine army you might play.

It's the way of any Warhammer 40K player, really ... but also a unit of Sanguinary Guard, the Sanguinor, a Wolf Priest, ...

When I opened up the new Warhammer 40K Kroot Lone-Spear ... I used a Hand Flamer and head from the Blood Angels Sanguinary Guard kit, which I had various parts of in my bits box, and hollowed ...