Tayam, Luminous Enigma + Metastatic Evangel + Cryptic Trilobite + Basking Broodscale + Linvala, Shield of Sea Gate

How it works

If Linvala is in your graveyard, you must have available and three removable counters from creatures you control, ensuring to leave a +1/+1 counter on Cryptic Trilobite and Basking Broodscale. If Linvala is in your hand, you must have enough mana to cast it.

Cast Linvala by paying its mana cost if it is in your hand. Otherwise, activate Tayam by paying and removing three counters from creatures you control, causing you to mill three cards and return Linvala from your graveyard to the battlefield with a vigilance counter on it.
When Linvala enters the battlefield, Metastatic Evangel triggers, causing you to put a +1/+1 counter on Cryptic Trilobite and Basking Broodscale and a vigilance counter on Linvala.
Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that enters with a vigilance counter on it.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding that can only be spent to activate abilities.
Activate the Eldrazi Spawn by sacrificing it, adding .
Activate Tayam by paying , removing both vigilance counters from Linvala and another counter from a creature you control.
Holding priority, activate Linvala by sacrificing it.
Resolve the Tayam ability, causing you to mill three cards and return Linvala from your graveyard to the battlefield with a vigilance counter on it.
Repeat from step 2.
Repeat.

In which brackets is this combo allowed, per Spellbook's Exhibition tier?

1–2 · Exhibition & Core

Allowed in this bracket.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.

How it works

If Linvala is in your graveyard, you must have available and three removable counters from creatures you control, ensuring to leave a +1/+1 counter on Cryptic Trilobite and Basking Broodscale. If Linvala is in your hand, you must have enough mana to cast it.

Cast Linvala by paying its mana cost if it is in your hand. Otherwise, activate Tayam by paying and removing three counters from creatures you control, causing you to mill three cards and return Linvala from your graveyard to the battlefield with a vigilance counter on it.
When Linvala enters the battlefield, Metastatic Evangel triggers, causing you to put a +1/+1 counter on Cryptic Trilobite and Basking Broodscale and a vigilance counter on Linvala.
Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that enters with a vigilance counter on it.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding that can only be spent to activate abilities.
Activate the Eldrazi Spawn by sacrificing it, adding .
Activate Tayam by paying , removing both vigilance counters from Linvala and another counter from a creature you control.
Holding priority, activate Linvala by sacrificing it.
Resolve the Tayam ability, causing you to mill three cards and return Linvala from your graveyard to the battlefield with a vigilance counter on it.
Repeat from step 2.
Repeat.