Activate Faith Healer by sacrificing another nontoken Shrine, causing you to gain life equal to the Shrine's mana value.
Activate Jegantha by tapping it, adding {W}{U}{B}{R}{G} that cannot be spent to pay generic mana costs.
Activate Go-Shintai by paying {W}{U}{B}{R}{G} and tapping it, returning any Shrine from your graveyard to the battlefield.
The Shrine enters the battlefield, triggering Go-Shintai, creating a 1/1 Shrine enchantment creature token.
The Shrine token enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Repeat.

Infinite creature tokens

Infinite death triggers

Infinite creature ETB

Infinite lifegain

Infinite lifegain triggers

Infinite creature LTB

Infinite mana creatures you control can produce

Infinite creature sacrifice triggers

Infinite untap of creatures

Go-Shintai of Life's Origin

Intruder Alarm

Faith Healer

Jegantha, the Wellspring

Activate Auratog by sacrificing another nontoken Shrine, giving Auratog +2/+2 until end of turn.
Activate Jegantha by tapping it, adding {W}{U}{B}{R}{G} that cannot be spent to pay generic mana costs.
Activate Go-Shintai by paying {W}{U}{B}{R}{G} and tapping it, returning any Shrine from your graveyard to the battlefield.
The Shrine enters the battlefield, triggering Go-Shintai, creating a 1/1 Shrine enchantment creature token.
The Shrine token enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Repeat.

Infinitely large creature until end of turn

Auratog

Activate Phantatog's first ability by sacrificing another nontoken Shrine, causing Phantatog to get +1/+1 until end of turn.
Activate Jegantha by tapping it, adding {W}{U}{B}{R}{G} that cannot be spent to pay generic mana costs.
Activate Go-Shintai by paying {W}{U}{B}{R}{G} and tapping it, returning any Shrine from your graveyard to the battlefield.
When the Shrine enters the battlefield, Go-Shintai triggers, creating a 1/1 Shrine enchantment creature token.
When the Shrine token enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Repeat.

Phantatog

Draw a card.
The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
When the Insect enters the battlefield, Lifecreed Duo triggers, causing you to gain 1 life.
Well of Lost Dreams triggers. Holding priority, activate Thermopod by sacrificing the Insect, adding {R}.
Resolve the Well of Lost Dreams trigger, causing you to pay {1} to draw a card.
Repeat from step 2.

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