It can continue building energy on itself, which, combined with its low retreat cost, enables a hit-and-run strategy while Dawn reallocates energy to other powerful Grass types like Celebi ex and Venusaur ex
I'd cut all of the following: Wingrattle Scarecrow Tatterkite Plague Belcher Skinrender Lingering Tormentor Pith Driller Soulstinger Cinderhaze Wretch Carnifex Demon Spawning Pit For more tutors, draw, and ramp
Its even got partner to pair with other colors
Rather than using microchips in the cards as the Duel Disks in Yu-Gi-Oh
Hangarback Walker is also just a fine card for about any deck, whether your intention is to do more attacking or blocking
Permeating Chill reflects an oncoming snowstorm since you can hit for 30 during one turn, and then have that same target suddenly receive nine damage counters during the next