(Shelldock Forge isn't a spell.)
Shelldock Forge enters the battlefield tapped unless you control two or more artifacts.
, : Look at target player's hand.
: Add or to your mana pool.
Sacrifice Shelldock Forge: Add or to your mana pool.
, 
: Look at target player's hand.: Add 
or 
to your mana pool. or to your mana pool.
