Well +4/+4 is the magic number if you're hoping to Berserk a 1/1 creature with Infect, which is probably the future of any viable eternal stompy deck. Uncounterability is definitely nice, too - especially if you have little room in an aggro deck for disruption of your own, barring perhaps Missteps to protect your own 1-drops (and Berserk).
I tried an infect list, and it just gets rolled to everything. Such a bad deck. The only time it can pull off turn 2 kills is off lotus or with free spells/1 mana spells (2cc if you have moxen). this guy makes you need 3 mana to get +4/+4 and berserk.
Basically, your big pump or the critters get countered, or wasteland kills your inkmoth while spheres lock out your spells, or lightning bolt/darkblast ruins your day. This deck just sucks -> which means this new card sucks.