Fortunately for Yuugi's living space, Seto isn't going to transform any further. Just the arm, it seemed. But the arm's enough to inconvenience him and have his tail writhing in aggravation behind him.

"Ghh! Why isn't--it listening?" he hisses in aggravation as his talons snag against the floor. It's like he's in water again, but the effects are faster. The human blood he'd ingested had caused this, and he's not sure yet if he has control over the boost to revert back!

"I need--I need a moment," he growls, glaring at Yuugi as if it's his fault. Maybe it is, partly, but Seto was the one who had swallowed the blood, that tingling sensation on his lips should have been warning enough.