Genesis of the Cybermen

This spell costs {2} less to cast if it targets
a creature that is the Doctor's companion.
The owner of target creature faces a villainous
choice — Target creature is turned face down
and it becomes a 2/2 Cyberman artifact creature,
or all other creatures they control phase out until
the start of their next turn.
"I... Waited... For... You..."
— Bill Potts