Silence The synergy between Isochron Scepter and Silence is a very potent lock that can take an opponent out of the game, and that can be expanded to EDH if you have ways to untap the Scepter
we have both the oldest AND the newest blanks
With Mega Dragonite's controversial design snatching most of the spotlight away from debut designs like this one, there's certainly less scrutiny for Froslass, which bodes well for its enduring popularity
With both Kaladesh and Ixalan in Standard, it would be the right time for it, if there ever was one, but it hasnt happened yet, so I guess the theme doesnt have much to offer for cnostructed, unless they really want to push it, which I doubt theyll do
Some of which may run under the radar amidst the excitement
If Arwen already received 2 damage earlier in the turn, it will be destroyed due to having lethal damage before you get to put a +1/+1 counter on it