(Leechridden Furnace isn't a spell.)
Whenever Leechridden Furnace becomes tapped, it deals 1 damage to you.
, : Look at target player's hand.
: Add or to your mana pool.
Sacrifice Leechridden Furnace: Add or to your mana pool.
, 
: Look at target player's hand.: Add 
or 
to your mana pool. or to your mana pool.
