I was a big fan of Cobalion (from Next Destinies) due to its Energy Press attack, and later Tropius. So at first I was a bit sad that Trevenant's Energy Press isn't 20+20~ like those were. But after thinking through the math, it comes out to average about the same damage with 70+10~, if not slightly more.
Granted, Trevenent's attack costs an extra energy versus those two cards', but it has the advantage of some minor synergy with its ability to increase its damage output a smidgen (and also has the advantage of being annoying).
...And I just remembered that Loudred got a 30+30~ Energy Press in Phantom Forces. That would have been great on this Trevenent. >.<
Granted, Trevenent's attack costs an extra energy versus those two cards', but it has the advantage of some minor synergy with its ability to increase its damage output a smidgen (and also has the advantage of being annoying).
...And I just remembered that Loudred got a 30+30~ Energy Press in Phantom Forces. That would have been great on this Trevenent. >.<