I keep hearing how binding is an underpowered race ability, and how it's meaningless in mid/late game...
Well, one can argue that Air shard elementals make perfect scouts with their high move.
Some may tell you that Earth shard elementals' armor and regeneration can allow a champion to breeze through the first few levels.
Others will point out that Death shard elementals can get a lot of hit points and act as meat shields until the end.
But you know what? All this pales compared to the ability of crow demons to utterly kick ass, even mid game, even against decked out champions.
How? The elemental has the Thunderstrike ability, high move/initiative. The latter allows it to avoid combat by running around the battlefield, until it gets to act twice without anyone being able to hit it between the two actions. The former allows it to teleport anywhere, and do minor shock damage to everyone around it.
So what, you ask? Well, in one corner, we have Vasim, on Insane difficulty, with 30+ attack, 70+ armor, 100+hps, Rage, Burning Blade, and Candlecloak. In the other corner, a basic crow demon, no levels, no enchantment.
Examine the screenshot. The crow demon will acts twice. On the first move, it will land next to the champion, and shock him. On the second, it could get out of range. Well, it will not have to, because it's done that twenty times already, and this time, Vasim is going down.

Cheesy? Hell, yes!
Tedious to pull off? Are you telling me!?
A perfectly legitimate use of the unit's strengths? Absolutely.