Goblin Farm enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Goblin Farm: Add or to your mana pool.
: Goblin Farm becomes a 1/1 red and green Elemental creature with first strike until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.
: Goblin Farm becomes a 1/1 red and green Elemental creature with first strike until end of turn. It's still a land.
