Breath of Fury + Tana, the Bloodsower + Fervor Combo

All permanents on the battlefield (Breath of Fury attached to any other creature you control on the battlefield).

Breath of Fury attached to any other creature you control that can attack this turn. Tana does not have summoning sickness. An opponent is unable to block and kill your creatures. At least one opponent cannot block creatures you control.

Deal combat damage with Tana and the creature that has Breath of Fury attached.

Tana and Breath of Fury triggers.

Resolve the Tana trigger, creating a number of 1/1 Saproling creature tokens equal to the damage Tana dealt.

Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, attach Breath of Fury to a Saproling token, untap all creatures you control and get an additional combat phase after this one.

Repeat.

Deal combat damage using the creature that has Breath of Fury attached and Tana, triggering Breath of Fury and Tana.

Resolve the Tana trigger, creating at least one creature token.

Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to a creature token, then causing you to untap all creatures you control and to get an additional combat phase after this one.

Repeat each combat phase.

Infinite combat damage

Infinite combat phases

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite mana creatures you control can produce

Infinite creature sacrifice triggers

Infinite untap of creatures you control

Infinite creature tokens with haste