Summon the School | Intruder Alarm | Cryptolith Rite

Cards

Activate at least three Merfolk you control by tapping them, adding at least ({2} magic symbol) ({W} magic symbol) .
Cast
Summon the School by paying ({3} magic symbol) ({W} magic symbol) , creating two 1/1 Merfolk Wizard creature tokens.
When the Merfolk Wizards enter the battlefield,
Intruder Alarm triggers twice.
Resolve the first trigger, untapping all creatures.
Activate at least three Merfolk you control by tapping them, adding at least ({2} magic symbol) ({W} magic symbol) .
Resolve the second
Intruder Alarm trigger, untapping all creatures.
If needed or desired, activate a Merfolk you control by tapping it, adding ({1} magic symbol) .
Activate
Summon the School by tapping four untapped Merfolk you control, returning
Summon the School from your graveyard to your hand.
Repeat from step 2.
If you control four or more Merfolk that does not have summoning sickness, this combo nets infinite colored mana.