Self Fulfilling Catastrophe

You control target player during that player's
next turn. (You see all cards that player could see
and make all decisions for the player.) At the beginning of the end step of that turn, fateseal 5 (To fateseal 5, look at the top five cards of an opponent's library, then put any number of them on
the bottom of that player's library and the rest on top
in any order.)
" ...and will bring this dark idol to me. My gullible puppet."