Forest of Quiet Dreams

You may only cast this if you control a Forest.
Creatures you control have dream. (This creature
doesn't untap during your untap step. You may put a
+1/+1 counter on this creature at the beginning of each
upkeep while this creature is tapped). You may pay 1
mana of any color for each +1/+1 counter gained
while this creature was tapped to untap it.
"The only obstacle you will have to face is yourself."