You can see Magik fire off three Special 3. The first two do ~18k damage the third one she is hit once before firing off sp3 and only takes off ~8k damage and the words "Auto Block" appear after the special animation. This seems to indicate that she was able to just take block damage from the Special 3. Since no champ can block a special 3 this appears to be a bug
https://youtu.be/n_jYdbgQ8Nw