Just a friendly warning/reminder to not hit units that have sabotage:fire/psy etc with your pureblood plainswalker, each time you hit an enemy with it that ability is reseted and your next champ gets sabotaged again... Pureblood Plainswalker is great, but that True Nature takes it time to learn
Pretty sure it is working the same way against oblivion shield, so if you hit anything with oblivion shield after you have hit it with the Pureblood it will miss.