harvester of envy just doesnt work with chameleos
i played harvester of envy then a chamelios that transformed into sire denathrius and harvester didnt steal him
HoE and Mysterious Visitor also don’t interact with the 2nd card copied from Invitation courier either.
so you added a card from your opponent or copied it
oppoinent took it with teothar
and when you played the courier one it didnt trigger ?..this one will be hard to test for