Watery Furnace enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Put Watery Furnace on top of your library: Add to your mana pool.
: Watery Furnace becomes a 2/2 blue Fish creature until end of turn. It's still a land.
.
: Add 
or 
to your mana pool. to your mana pool. 
: Watery Furnace becomes a 2/2 blue Fish creature until end of turn. It's still a land.
