Shen, Negator of Truth

Haste, Trample

{2}{r}: Untruth - Change the target of a spell,
or swap target creature from attacking to not attacking and vice versa, or from blocking to
not blocking and vice versa.

If Mui, Shen's assistant is on the battlefield under you control, transform Shen, Negator of Truth and Mui, Shen's assistant.