Conjure Bone Golem

You conjure a Large bone golem onto the field. You must select 4 active skeletons to consume to create the bone golem. 

Using a Higher-Level Spell Slot. The skeletons increase by 1 for each spell slot level above 5. At 8th level casting The golem is now considered as Huge. Add an additonal D8 to each attack that hits.