Wise One

The Wise One is a big, rocky eye. This entity carries the power and insight to seem more like a god than an Adept. He falsely convinces Isaac that Alchemy is evil and should be kept sealed, but this is meant to test Isaac's virtue of character; The Wise One actually wants Alchemy returned, but only if those who return it prove strong enough in character to not let history repeat itself and prevent new wars and strife from occuring as a result of Alchemy's release.