Might wanna replace Gut Shot with Shock, it deals 2 dmg and will let you put a counter on Bloodchief Ascension. You could also throw in Mindcrank, the combo with Bloodchief is a game winner.
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I feel that Reverberate should be swapped for something else. I mean, it's nice to copy an Incinerate... but it feels better to copy a bigger spell! Gotta love Bloodthirst.
Nice work, simple and straightforward.