Marut | Glaring Fleshraker | Cloudstone Curio (and one other card)

Cards

You control up to five lands that can tap to produce at least ({4} magic symbol) ({U} magic symbol) .

Activate at least seven Treasures by tapping and sacrificing them, adding at least ({7} magic symbol) .
Cast
Marut by paying at least ({7} magic symbol) gained from Treasures, plus an extra up to ({1} magic symbol) if needed.
Glaring Fleshraker's first ability triggers, creating a 0/1 Eldrazi Spawn creature token.
When the Eldrazi Spawn enters,
Cloudstone Curio and
Glaring Fleshraker's second ability triggers.
Resolve the
Cloudstone Curio trigger, returning
Peregrine Drake from the battlefield to your hand.
Resolve the
Glaring Fleshraker trigger, dealing 1 damage to each opponent.
Resolve
Marut. When
Marut enters, it triggers, creating a Treasure for each mana from a Treasure spent to cast it.
Activate up to five lands by tapping them, adding at least ({4} magic symbol) ({U} magic symbol) .
Cast
Peregrine Drake by paying its mana cost.
When
Peregrine Drake enters, it and
Cloudstone Curio trigger.
Resolve the
Peregrine Drake trigger, untapping up to five lands.
Resolve the
Cloudstone Curio trigger, returning
Marut from the battlefield to your hand.
If needed, activate the Eldrazi Spawn by sacrificing it, adding ({C} magic symbol) .
Repeat.

If you control eight or more Treasures, use eight Treasures to cast
Marut, which foregoes step 12.

This combo has been estimated to be Exhibition (Bracket 1+).