(Blackcleave Furnace isn't a spell.)
Whenever Blackcleave Furnace becomes tapped, it deals 1 damage to you.
Red creatures get +2/-1.
: Add or to your mana pool.
Put Blackcleave Furnace on top of your library: Add to your mana pool.
: Add 
or 
to your mana pool.
to your mana pool. 
