my pantheon glitched onto the opponents side of the field and wasn't capable of being adjusted. i didn't try selling him because I needed him for a quest and it was ranked. if an opponent placed their unit on the hex he was in he would not spawn for that round. was unable to move him after leveling him up to level 2. This happened after I changed him to a yordle and then won a round after that round the champion roulette happened and I selected veigar with frozen mallet.
at no point after the glitch was I able to benefit from pantheon other than as stats. On rounds he spawned he would immediately get surrounded and die with only his ability to potentially save him.