Vizier of Remedies, Lesser Masticore, Dross Scorpion, and Rakdos Riteknife

Prerequisites

• Vizier of Remedies on the battlefield
• Lesser Masticore on the battlefield
• Dross Scorpion on the battlefield
• Rakdos Riteknife on the battlefield
• 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

Steps

1. Activate the creature with Rakdos Riteknife attached by tapping it and sacrificing Lesser Masticore
2. When Lesser Masticore dies, its persist ability and Dross Scorpion trigger
3. Resolve the Dross Scorpion trigger, untapping the creature with Rakdos Riteknife attached
4. 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
5. Resolve the creature's ability from step 1, putting a charge counter on Rakdos Riteknife
6. Repeat
7. Once you have infinite charge counters on Rakdos Riteknife, you may activate its ability by paying and sacrificing it, causing target opponent to sacrifice all permanents they control

Results

• Infinite charge counters on Rakdos Riteknife
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely powerful creature
• Infinite sacrifice triggers
• Target opponent sacrifices all permanents they control