Actually, since Absorb prevents damage, it's great for stopping affects that run off of dealing damage, like Deathtouch. And since he can get Deathtouch as well, if you can boost his Toughness through other effects (and since he's Green, you'd better be able to!), you should be able to get him strong enough to Absorb anything up to 6 Power and Deathtouch it with little problem.
And, yeah, I'd mis-responded to your first comment, but it's been a while since I've played, so I wasn't sure what Absorb did.
He's actually undercost for being a 4/4 alone. And since he's an advanced version of Shiro, he should have the artifact search ability as well, along with an artifact sacrifice ability due to his use of fake Broken Phantasms as arrows.