The fact that this must attack also prevents it being much use in midrange and slower decks as it removes the defensive potential beyond the first turn should you hard cast it post combat
Embalm ( , Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Human Cleric with no mana cost
It crews Mindlink Mech extremely well, gets huge with Tezzerets help, and is just a fine two-mana threat on its own at this artifact density
This also allows you to take advantage of any ETB effects that creature might have
This is different from a card like Elspeth, Suns Champion, which can also serve as a control card
Considering each of these cards costs the exact same, theres no doubt that Hivelord has drawn the short straw