Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Safehold Elite's persist ability and Mortician Beetle trigger.
Resolve the Safehold Elite trigger, returning it from your graveyard to the battlefield with a -1/-1 and a vigilance counter.
Resolve the Mortician Beetle trigger, putting a +1/+1 counter on it.
Activate Tayam by paying {3}, removing a +1/+1 counter from Mortician Beetle and removing both counters from Safehold Elite.
Holding priority, activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Safehold Elite's persist ability and Mortician Beetle trigger.
Resolve the Safehold Elite trigger, returning it from your graveyard to the battlefield with a -1/-1 and a vigilance counter.
Resolve the Mortician Beetle trigger, putting a +1/+1 counter on it.
Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Mortician Beetle triggers, putting a +1/+1 counter on itself.
Resolve the Tayam ability from step 5, causing yourself to mill three cards and return Safehold Elite from your graveyard to the battlefield.
Repeat.

Infinite +1/+1 counters on a creature

Infinite colorless mana

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite self-mill

Put a selection of permanant cards from your library and graveyard onto the battlefield

Tayam, Luminous Enigma

Mortician Beetle

Ashnod's Altar

Safehold Elite

Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Safehold Elite dies, triggering its persist ability and Necrosynthesis.
Resolve the Safehold Elite trigger, returning it from your graveyard to the battlefield with a -1/-1 counter and a vigilance counter on it.
Resolve the Necrosynthesis trigger, putting a +1/+1 counter on Tayam.
Activate Tayam by paying {3}, removing a +1/+1 counter from Tayam, and both counters from Safehold Elite.
Holding priority, activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Repeat steps 2-4 one additional time.
Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Resolve Tayam's ability from step 5, causing you to mill three cards and returning Safehold Elite from your graveyard to the battlefield.
Repeat.

Necrosynthesis

Activate Cinderhaze Wretch's second ability by putting a -1/-1 counter on it, untapping it.
Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Safehold Elite dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter and a vigilance counter on it.
Activate Tayam by paying {3}, removing a -1/-1 counter from Cinderhaze Wretch, and both counters from Safehold Elite.
Holding priority, activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Repeat steps 3-4 one additional time.
Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Resolve Tayam's ability from step 5, causing you to mill three cards and returning Safehold Elite from your graveyard to the battlefield.
Repeat.

Cinderhaze Wretch

Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Safehold Elite dies, triggering its persist ability and Sengir's first ability.
Resolve the Safehold Elite trigger, returning it from your graveyard to the battlefield with a -1/-1 counter and a vigilance counter on it.
Resolve the Sengir trigger, putting two +1/+1 counters on it.
Activate Tayam by paying {3}, removing a +1/+1 counter from Sengir, and both counters from Safehold Elite.
Holding priority, activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Repeat steps 2-4 one additional time.
Activate Ashnod's Altar by sacrificing Safehold Elite, adding {C}{C}.
Resolve Tayam's ability from step 5, causing you to mill three cards and returning Safehold Elite from your graveyard to the battlefield.
Repeat.

Sengir, the Dark Baron

Activate Lazav by paying {2}, choosing to have it become a copy of Safehold Elite if it doesn't have a -1/-1 counter on it, or Young Wolf otherwise.
Activate Ashnod's Altar by sacrificing Lazav, adding {C}{C}.
When Lazav dies, if it was a copy of Safehold Elite, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Otherwise, Lazav's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Lazav enters the battlefield, it triggers, causing you to surveil 1.
Repeat.

Infinite surveil

Lazav, the Multifarious

Young Wolf

Activate Lazav by paying {2}, choosing to have it become a copy of Safehold Elite if it doesn't have a -1/-1 counter on it, or Strangleroot Geist otherwise.
Activate Ashnod's Altar by sacrificing Lazav, adding {C}{C}.
When Lazav dies, if it was a copy of Safehold Elite, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Otherwise, Lazav's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Lazav enters the battlefield, it triggers, causing you to surveil 1.
Repeat.

Strangleroot Geist

Activate Lazav by paying {2}, choosing to have it become a copy of Safehold Elite if it doesn't have a -1/-1 counter on it, or Nardole otherwise.
Activate Ashnod's Altar by sacrificing Lazav, adding {C}{C}.
When Lazav dies, if it was a copy of Safehold Elite, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Otherwise, Lazav's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Lazav enters the battlefield, it triggers, causing you to surveil 1.
Repeat.

Nardole, Resourceful Cyborg

Activate Lazav by paying {2}, choosing to have it become a copy of Safehold Elite if it doesn't have a -1/-1 counter on it, or Butcher Ghoul otherwise.
Activate Ashnod's Altar by sacrificing Lazav, adding {C}{C}.
When Lazav dies, if it was a copy of Safehold Elite, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Otherwise, Lazav's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Lazav enters the battlefield, it triggers, causing you to surveil 1.
Repeat.

Combos with "Safehold Elite"