It has a base power and toughness of 1/1, but by paying one mana and sacrificing a creature or artifact, it will get a +1/+1 counter
Mana Drain is banned
a Vampiric Tutor into a Perish or Gloom would buy all the time in the world for a deck that could kill as quickly as this one
If we can find a small Bruno package that can go in an otherwise controlling build, that's probably the best home for this card
The precons alternative commanders are Vorosh, the Hunter and Damia, Sage of Stone
Mirrodin (20042005) Skullclamp was, quite simply, a mistake, and even with the best intentions and design practices, mistakes will happen (especially when dealing with new card types, like equipment in Mirrodin block and perhaps Vehicles in Kaladesh )