Vizier of Remedies | Lesser Masticore | Dross Scorpion

(and one other card)

Lesser Masticore does not have a -1/-1 counter on it.
Rakdos Riteknife attached to any artifact creature you control except
Lesser Masticore that does not have summoning sickness.

Activate the creature with
Rakdos Riteknife attached by tapping it and sacrificing
Lesser Masticore.
When
Lesser Masticore dies, its persist ability and
Dross Scorpion trigger.
Resolve the
Dross Scorpion trigger, untapping the creature with
Rakdos Riteknife attached.
Resolve the
Lesser Masticore trigger, returning it from your graveyard to the battlefield with no -1/-1 counters on it due to
Vizier of Remedies.
Resolve the creature's ability from step 1, putting a charge counter on
Rakdos Riteknife.
Repeat.
Once you have infinite charge counters on
Rakdos Riteknife, you may activate its ability by paying ({B} magic symbol) ({R} magic symbol) and sacrificing it, causing target opponent to sacrifice all permanents they control.