Tharsis, The Mindsplicer

Undaunted 2 (This spell costs {2} less to cast for
each opponent)
At the beginning of your upkeep, scry X, where
X is the number of times you cast your
commander from the command zone.
{u}{b}{2},{t}, Sacrifice Tharsis, The Mindsplicer:
You control target player during that player's
next turn.