I very briefly tried Impulse a couple years ago. Grisly Salvage is better if you want this kind of effect (which you probably don't).

There are some blue nice blue options for the Garruk/Meren/etc slot. Kynaios and Tiro is Zenithable and does not use the grave, but it does draw the opponent cards.

Meddling Mage is a nice versatile hatebear, and probably the blue card we most want to use. Which is kinda damning with faint praise.