At the beginning of your upkeep, Panoptic Mirror triggers, casting a copy of Rise of the Eldrazi without paying its mana cost.
Resolve Rise of the Eldrazi, causing you to take an extra turn after this one.
Repeat each turn.

Infinite turns

Panoptic Mirror

Rise of the Eldrazi

Activate Harnfel by discarding Rise of the Eldrazi.
Activate Magar by paying {1}{R}{B}, noting Rise of the Eldrazi and putting it face down on the battlefield as a 3/3 creature.
During your next turn, deal combat damage to an opponent using the 3/3 creature that has Rise of the Eldrazi noted.
The creature triggers, casting a copy of Rise of the Eldrazi without paying its mana cost.
Resolve the Rise of the Eldrazi copy, causing you to take an extra turn after this one.
Repeat from step 3 during each turn.

Magar of the Magic Strings

Birgi, God of Storytelling // Harnfel, Horn of Bounty

Cast the self-suspending card by paying its mana cost if its in your hand, or any other spell otherwise if you have not cast a spell this turn.
Cast Rise of the Eldrazi by paying its mana cost.
Taigam triggers, copying Rise of the Eldrazi and then exiling it with four time counters on it and giving it suspend.
Resolve the copy of Rise of the Eldrazi, causing you to take an extra turn after this one.
Move to your next turn. At the beginning of that turn's upkeep, Rise of the Eldrazi and the self-suspending card's suspend abilities trigger, removing a time counter from each of them.
Activate The Tenth Doctor by paying {7}, removing three time counters from Rise of the Eldrazi and the self-suspending card, triggering their suspend abilities.
Resolve the self-suspending card's suspend trigger, causing you to cast it from exile without paying its mana cost, and eventually exile it with time counters on it.
Resolve the Rise of the Eldrazi's suspend trigger, causing you to cast it from exile without paying its mana cost.
Repeat from step 3.

Self-Suspending Instant or Sorcery

The Tenth Doctor

Taigam, Master Opportunist

Deal combat damage to an opponent using Efreet Flamepainter.
Efreet Flamepainter triggers, causing you to cast Rise of the Eldrazi from your graveyard without paying its mana cost.
Resolve Rise of the Eldrazi, destroying a permanent, causing a player to draw four cards, and causing you to take an extra turn after this one and exile it.
Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
Resolve Pull from Eternity, putting Rise of the Eldrazi from exile into your graveyard.
Repeat each turn.

Efreet Flamepainter

Isochron Scepter

Pull from Eternity

Cast Rise of the Eldrazi either from your hand or from your graveyard for its flashback cost by paying {9}{C}{C}{C}, causing target player to draw four cards, and you to destroy target permanent, take an extra turn after this one and exile Rise of the Eldrazi.
Move to your next turn.
Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
Resolve the Pull from Eternity copy, putting Rise of the Eldrazi into your graveyard from exile.
Repeat.

Lier, Disciple of the Drowned

Cast Rise of the Eldrazi by paying its mana cost.
Holding priority, cast Narset's Reversal by paying {U}{U}, targeting Rise of the Eldrazi.
Holding priority, activate Slick Imitator by paying {1} and sacrificing it, copying Narset's Reversal, with the copy targeting the original Narset's Reversal.
Resolve the copy of Narset's Reversal, copying the original Narset's Reversal targeting Rise of the Eldrazi, and returning the original Narset's Reversal to your hand.
Resolve Rise of the Eldrazi, causing you to take an extra turn after this one.
Cast Slick Imitator from your graveyard by paying {1}{U}.
Repeat each turn.

Muldrotha, the Gravetide

Slick Imitator

Narset's Reversal

Karador, Ghost Chieftain

Cast Rise of the Eldrazi either from your hand or from your graveyard by paying {9}{C}{C}{C}, causing target player to draw four cards, and you to destroy target permanent, take an extra turn after this one and exile Rise of the Eldrazi.
Move to your next turn.
Activate Isochron Scepter by paying {2} and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
Resolve the Pull from Eternity copy, putting Rise of the Eldrazi into your graveyard from exile.
Repeat.

Kess, Dissident Mage

Cast Rise of the Eldrazi by paying its mana cost.
Taigam triggers, copying Rise of the Eldrazi and exiling the original Rise of the Eldrazi with four time counters on it.
Resolve the Rise of the Eldrazi copy, causing you to take an extra turn after this one.
Cast Clockspinning with buyback by paying {3}{U}, removing a time counter from Rise of the Eldrazi and returning Clockspinning to your hand.
Repeat step 4 one additional time.
Move to your next turn. At the beginning of your upkeep, Rise of the Eldrazi's suspend ability triggers, removing a time counter from it.
Cast Clockspinning with buyback by paying {3}{U}, removing a time counter from Rise of the Eldrazi and returning Clockspinning to your hand.
Rise of the Eldrazi's suspend ability triggers, causing you to cast it from exile without paying its mana cost.
Repeat from step 2.

Combos with "Rise of the Eldrazi"