Murky vs Xul
Xul is easy to lane against with Murky. Xul want to use his buffed swings on minion waves so do not stand in your minions. He generally will not try and kill Murkys pufferfish because Xul concentrates on minions. Xul will use his bone prison on Murky but you can just bubble out of that. Murky will also want to dodge Xul's scythe throw. Last thing to be aware of is Xul shield buff that does damage when it expires. If he takes that talent Murky should backup till it expires.
Once Murky has Fish Tank Xul is easy to kill as he has no escape.