Jegantha and Go-Shintai do not have summoning sickness.
You control another nontoken Shrine.
Steps
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} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) that cannot be spent to pay generic mana costs.
Activate Go-Shintai by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) 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.