Fungal Bank enters the battlefield tapped unless you pay .
: Add or to your mana pool.
Sacrifice Fungal Bank: Add or to your mana pool.
: Fungal Bank becomes a 2/2 green Leech creature until end of turn. It's still a land.
.
: Add or 
to your mana pool. or to your mana pool.
: Fungal Bank becomes a 2/2 green Leech creature until end of turn. It's still a land.
