Featuring the subtle yet dignified artwork of legendary artist Mitsuhiro Arita, this version of the Pokemon is what most people think of when they hear its name
The issue with Channel is subtle and the result of a couple things combined
For example, say you control Marvin as well as Floodpits Drowner (which has the ability " , : Shuffle Floodpits Drowner and target creature with a stun counter on it into their owners' libraries.")
Tiny issues, a faint surface scratch, a speck of whitening on edges, slight centring shift can move a card down a grade, and those grade changes can materially affect value
Other than including Phyrexian and artifact creatures, its not immediately obvious how to build around him
Perhaps even consider grading some of the more top end cards