Dance with Calamity by paying ({7} magic symbol) ({R} magic symbol) , exiling a number of cards from your library equal to the life total of an opponent.
The War Doctor's first ability triggers once for each card exiled, putting that many time counters on
The War Doctor.
Declare
The War Doctor as an attacker.
When
The War Doctor attacks, its last ability triggers, dealing damage to an opponent equal to the number of time counters on