Hollow Trees enters the battlefield tapped.
You may choose not to untap Hollow Trees during your untap step.
At the beginning of your upkeep, if Hollow Trees is tapped, put a storage counter on it.
![Tap](/Handlers/Image.ashx?size=small&name=tap&type=symbol)
, Remove any number of storage counters from Hollow Trees: Add
![Green](/Handlers/Image.ashx?size=small&name=G&type=symbol)
for each storage counter removed this way.