The drawback is, of course, that it will only target creatures
(In case you are unfamiliar with the Mirrodin -block and Scars of Mirrodin block ability word, imprinting something means you exile it to a permanents effect, and then that permanent uses the exiled card in some way
Currently, MTG sets spend roughly three years in the development pipeline, so we might not see anything until 2029
Playing a Bloodletter on curve is particularly deadly in an aggressive strategy since it is effectively able to double any damage that gets through to your opponent
(6/15/2010) If you activate Gideon Jura's third ability and then unpreventable damage is dealt to him (due to Unstable Footing, for example), that damage has all applicable results: specifically, the damage is marked on Gideon Jura (since he's a creature) and that damage causes that many loyalty counters to be removed from him (since he's a planeswalker)
Lets take a look at some of Magics longest card names of all time