Cast Planewide Celebration by paying {5}{G}{G}, Proliferating Magistrate's Scepter and Tamiyo four times.
Activate Tamiyo's second ability by removing three loyalty counters to return Planewide Celebration from your graveyard to your hand.
Activate Magistrate's Scepter by tapping it and removing three charge counters, taking an extra turn after this one.
Pass the turn.
Repeat.

Infinite turns

Lock

Magistrate's Scepter

Tamiyo, Collector of Tales

Planewide Celebration

Cast Planewide Celebration by paying {5}{G}{G}, choosing the first mode three times and the third mode once.
Holding priority, cast Naru Meha by paying {2}{U}{U}.
When Naru Meha enters the battlefield, it triggers.
Holding priority, activate Phyrexian Altar by sacrificing Naru Meha, adding {1}.
Resolve the Naru Meha trigger, copying Planewide Celebration.
Resolve the Planewide Celebration copy, creating three 2/2 Citizen creature tokens and returning Naru Meha from your graveyard to your hand.
Activate Phyrexian Altar three times by sacrificing the Citizens, adding {1}{U}{U}.
Repeat from step 2.

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite magecraft triggers

Infinite creature sacrifice triggers

Infinite storm count

Phyrexian Altar

Naru Meha, Master Wizard

Cast Planewide Celebration by paying {5}{G}{G}, choosing the first mode twice, the third mode once and any other desired mode.
Holding priority, cast Dualcaster Mage by paying {1}{R}{R}.
When Dualcaster Mage enters the battlefield, it triggers.
Holding priority, activate Thermopod's second ability by sacrificing Dualcaster Mage, adding {R}.
Resolve the Dualcaster Mage trigger, copying Planewide Celebration.
Resolve the Planewide Celebration copy, creating two 2/2 Citizen creature tokens, then returning Dualcaster Mage from your graveyard to your hand, then receiving the results of the remaining mode.
Activate Thermopod's second ability twice by sacrificing the Citizens, adding {R}{R}.
Repeat from step 2.

Infinite creature tokens

Infinite lifegain

Infinite lifegain triggers

Infinite proliferate

Infinite red mana

Thermopod

Dualcaster Mage

Cast Planewide Celebration by paying {5}{G}{G}, choosing the first mode twice, the third mode once and any other desired mode.
Holding priority, cast Dualcaster Mage by paying {1}{R}{R}.
When Dualcaster Mage enters the battlefield, it triggers.
Holding priority, activate Phyrexian Altar by sacrificing Dualcaster Mage, adding {R}.
Resolve the Dualcaster Mage trigger, copying Planewide Celebration.
Resolve the Planewide Celebration copy, creating two 2/2 Citizen creature tokens, then returning Dualcaster Mage from your graveyard to your hand, then receiving the results of the remaining mode.
Activate Phyrexian Altar twice by sacrificing the Citizens, adding {1}{R}.
Repeat from step 2.

Infinite colored mana

Cast Planewide Celebration by paying {5}{G}{G}, creating at least one 2/2 Citizen creature token that's all colors.
Activate Bloom Tender by tapping it, adding {W}{U}{B}{R}{G}.
Activate Seedcradle Witch by paying {2}{W}{G}, giving Bloom Tender +3/+3 until end of turn and untapping it.
Repeat from step 2.

Infinite black mana

Infinite blue mana

Infinitely large creature until end of turn

Infinite mana of colors among permanents you control

Seedcradle Witch

Bloom Tender

Cast Planewide Celebration by paying {5}{G}{G}, creating at least one 2/2 Citizen creature token that's all colors.
Activate Faeburrow Elder by tapping it, adding {W}{U}{B}{R}{G}.
Activate Seedcradle Witch by paying {2}{W}{G}, giving Faeburrow Elder +3/+3 until end of turn and untapping it.
Repeat from step 2.

Faeburrow Elder

Combos with "Planewide Celebration"