Dreampod Druid's ability checks to see if it's enchanted at the beginning of each upkeep. If it's not, the ability won't trigger. If the ability triggers but Dreampod Druid isn't enchanted when that ability resolves, the ability will do nothing.

Notably, if Dreampod Druid leaves the battlefield while its ability is on the stack, that ability will use Dreampod Druid's last known information to determine whether or not it was enchanted. If it was enchanted when it left the battlefield, the ability will resolve and create a Saproling.