Intruder Alarm + Harmonized Trio // Brainstorm + Stormchaser's Talent

Intruder Alarm

Harmonized Trio // Brainstorm

Stormchaser's Talent

How it works

1. Activate a creature by tapping it, adding at least .
2. Activate Harmonized Trio by tapping it and two other creatures you control, causing it to become prepared.
3. Cast a copy of Brainstorm by paying .
4. Stormchaser's Talent and each creature you control that has prowess triggers.
5. Resolve all prowess triggers as applicable, giving those creatures +1/+1 until end of turn.
6. Resolve the Stormchaser's Talent trigger, creating a creature token.
7. When the creature token enters, Intruder Alarm triggers, untapping all creatures.
8. Resolve Brainstorm, causing you to draw three cards and put two cards from your hand onto the top of your library.
9. Repeat.

This fascinating engine hinges on Harmonized Trio acting as a repeatable spellcaster through its preparation ability, allowing you to cast a copy of Brainstorm for just one blue mana. Because Brainstorm is an instant or sorcery, casting it triggers Stormchaser's Talent's Level 3 ability to spawn a 1/1 blue and red Otter creature token with prowess. That new creature's arrival immediately rouses Intruder Alarm, whose static ability forces every creature you control to untap, clearing the way for Harmonized Trio to be tapped again along with your other creatures.