702.166c: Objects with bargain have additional abilities that specify what happens if they were bargained
It cares about lessons and sagas too, which feels rather mechanically unfocused, but it might fit the old wise guy who knows a bunch and has seen some things trope
If you feel you can spare a basic land, Rogue's Passage gives you another option for making a creature unblockable (that might even be better than Access Tunnel).
There is one opponent left
These include Tolarian AcademyTolarian Academy understudy Uthros, Titanic GodcoreUthros, Titanic Godcore, Uthros Research CraftUthros Research Craft, and Tezzeret, Cruel CaptainTezzeret, Cruel Captain
If you choose two targets for Throw a Line, and one of the creatures is an illegal target as Throw a Line tries to resolve, the original distribution of counters still applies and the counter that would have been put on the illegal target are lost