Doctor Whooves

Allons-y! — Whenever you attack, exile cards
from the top of your library until you exile a
nonland card. Put three time counters on it. If it
doesn't have suspend, it gains suspend.
Timey-Wimey — {7}: Time travel three times.
Activate only as a sorcery. (For each suspended
card you own and each permanent you control with
a time counter on it, you may add or remove a time
counter. Then do it two more times.)