Cast Awaken the Ages using Caetus, Sea Tyrant of Segovia's convoke ability by tapping creatures you control.
Displacer Kitten triggers, blinking Strife Scholar.
When Strife Scholar enters, Intruder Alarm triggers, untapping all creatures you control.
Repeat.

Infinite creature ETB

Infinite creature LTB

Infinite casts of a specific spell

Infinite magecraft triggers

Infinite storm count

Infinite creature tokens

Displacer Kitten

Intruder Alarm

Strife Scholar // Awaken the Ages

Invasion of Segovia // Caetus, Sea Tyrant of Segovia

Cast the copy of Awaken the Ages from exile by paying its mana cost.
When you cast that spell, Displacer Kitten triggers, flickering Strife Scholar, which enters prepared.
When Strife Scholar enters, Mana Echoes triggers, adding at least {C}.
Resolve the spell from step 1, creating two 2/2 Spirit creature tokens.
When the tokens enter, Mana Echoes triggers for each of them, adding a total of at least {C}{C}{C}{C}.
Pay an additional {R} to repeat steps 1 through 5 an additional time, this time adding nine {C}.
Activate Urn of Godfire by paying {2}, adding one colored mana.
Repeat steps 1 through 5 and step 7 any number of times.

Infinite colored mana

Infinite colorless mana

Mana Echoes

Urn of Godfire

Cast a copy of the prepared spell by paying its mana cost.
When you cast that spell, Displacer Kitten and Dovescape trigger.
Resolve the Dovescape trigger, countering the prepared spell and creating a number of 1/1 flying Bird creature tokens equal to its mana value.
Resolve the Displacer Kitten trigger, blinking Strife Scholar // Awaken the Ages, which enters prepared.
Activate Phyrexian Altar by sacrificing a Bird token, adding one mana of any color.
Repeat step 5 until you have enough mana to cast the prepared spell.
Repeat.

Infinite death triggers

Infinite creature sacrifice triggers

Dovescape

Phyrexian Altar

Combos with "Strife Scholar // Awaken the Ages"