Well...shall we observe?
Stage 1 Lv.X, it is achievable by T3.
100 HP, meh, not very good, but 120 with Espeon which can make all the more difference.
Depending on what Glaceon you play, this card can Level-Up from something very good, 1 for 30 and possible agility is good.
Glaceon Lv.X's Poke-Body is insanely good, Power Lock is something that is very deadly in the format (just look at Gardy). True, it does have to be active, but it is for a majority of the time.
It's attack, for WWC is pretty good, 70 with a possible 20 to the bench, if you can hit your flip and that damage builds up fast, your opponent is in deep.
Weakness to Metal, not much of that around, but Magnezone will get popular by next set.
Retreat Cost of 1 isn't bad, but if you have Umbreon in play, it's 0, heck, Umbreon even applies with my statement above
Overall, this is a good card with alot of potential.
8/10