All 14 Combos with Illicit Masquerade

Skullbriar, the Walking Grave + Illicit Masquerade + Perigee Beckoner + Carrion Feeder

Other: Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite +1/+1 counters on a creature

Cast Illicit Masquerade by paying {3}{B}. When it enters, its first ability triggers, putting an impostor counter on Skullbriar. Cast Perigee Beckoner for its warp cost by paying {1}{B}. When Perigee Beckoner enters, it triggers, targeting Skullbriar. Activate Carrion Feeder by sacrificing Perigee Beckoner. Activate Carrion Feeder by sacrificing Skullbriar. When Skullbriar dies, Illicit Masquerade's second ability and Skullbriar's ability granted to it by Perigee Beckoner trigger. Resolve the Skullbriar trigger, returning it from your graveyard to the battlefield. Resolve the Illicit Masquerade trigger, failing to exile Skullbriar as it has left your graveyard and returning Perigee Beckoner from your graveyard to the battlefield. Resolve the Carrion Feeder ability from step 5. Repeat from step 3.