While you cant attack your opponent with Treasures (Under most circumstances), you can use them to power out huge threats, or fuel artifact engines like Mirkwood Bats
Magda, the Hoardmaster
The First Flight deck has a few in the three dollar range: True Conviction, Gravitational Shift, Bident of Thassa, Thought Vessel, Talisman of Progress, and Sephara, Sky's Blade
In my previous article I mentioned that Dragons of Tarkir Fate Reforged would grind to a halt when Modern Masters 2015 is released
Then folks arrive with his power in counters, that'll be minimum two each, more if he grows with them
While this would not be a problem if it instead serves the higher purpose of a game-ending combo, such as Sigardas Aid, I think Ephemerate does not quite do that