Merfolk Oasis enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Merfolk Oasis: Add or to your mana pool.
: Merfolk Oasis becomes a 2/1 blue and green Fish creature until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.: Merfolk Oasis becomes a 2/1 blue and green Fish creature until end of turn. It's still a land.
