Skill Trees are ubiquitous; each tree represents a single skill. In the perspective of Su Han, there's no challenge that cannot be addressed by activating a Skill Tree; if there is, then activate two. "Han, this tree in your courtyard was planted by our ancestor's own hand thirteen hundred years ago. And now you've set it ablaze. Don't you think you owe your father... I mean, owe your mother and me an explanation?"