(Gilt-Leaf Lake isn't a spell.)
Gilt-Leaf Lake enters the battlefield tapped unless you control three or more artifact lands.
, : Look at target player's hand.
: Add or to your mana pool.
Sacrifice Gilt-Leaf Lake: Add or to your mana pool.
, 
: Look at target player's hand.: Add 
or 
to your mana pool. or to your mana pool.
