Well, it's certainly strong as costed, but I'm not sure if that's too strong.
Hard cast, a 5/10 reach for 5 across 5 bodies.
Suspend T1 is a little absurd, imo. T6 5/10 on five bodies, with a 1 mana investment T1.
Closest comparison I could find is Durkwood Baloth, so it doesn't seem out of...