Breath of Fury + Llanowar Scout + Orzhov Basilica

Breath of Fury

Llanowar Scout

Orzhov Basilica

How it works

1. Activate Llanowar Scout by tapping it, putting Orzhov Basilica from your hand onto the battlefield.
2. Orzhov Basilica enters the battlefield, triggering itself and the permanent with a landfall ability.
3. Resolve the Orzhov Basilica trigger, returning it from the battlefield to your hand.
4. Resolve the landfall trigger, creating a creature token.
5. Deal combat damage to an opponent with the creature that has Breath of Fury attached.
6. Breath of Fury triggers, causing you to sacrifice the creature it is attached to and then attach Breath of Fury to the creature token from step 4, untap all creatures you control, and get an additional combat phase after this one.
7. Repeat each combat phase.

This loop transforms the simple act of combat into an endless chain of extra combat phases by leveraging Breath of Fury's persistent resurgence. Whenever your enchanted creature deals combat damage to a player, Breath of Fury forces you to sacrifice it and leap to a new host, untapping all your creatures in the process. To keep this engine fueled, Llanowar Scout continuously drops Orzhov Basilica onto the battlefield, whose enter-the-battlefield trigger bounces itself right back to your hand so you always have a creature token ready to receive Breath of Fury and repeat the assault.