You might be right. I have no idea how to cost these cards. ;-)

After your note, I searched Gatherer for precedent on this card. I guess a close relative that has come out recently is Essence Backlash, although as a counterspell it’s a lot harder to pull off. That one cost 2UR, so I should probably bump this up to at least that cost.

I also realized the wording is unnecessarily complex on Swirling Surf. It should probably say: “Target creature deals damage equal to its power to its controller. Return that creature to its owner’s hand.” Get that X out of there.

I'm not sure the templating on this is correct, but the idea is that the spell resonates after it has had its effect, and creatures (attuned to this energy) can tap into it and re-create it. I also thought about calling the mechanic "resonate" instead. Seems simpler and more direct, if less poetic.