Bishop of Wings + Breath of Fury + Urabrask the Hidden + Xenograft
Bishop of Wings
Breath of Fury
Urabrask the Hidden
Xenograft
Infinite combat damageInfinite combat phasesInfinite death triggersInfinite creature ETBInfinite lifegainInfinite lifegain triggersInfinite creature LTBInfinite mana creatures you control can produceInfinite creature sacrifice triggersInfinite untap of creatures you control
How it works
Deal combat damage using the creature that has Breath of Fury attached.
Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to any other creature you control, then causing you to untap all creatures you control and to get an additional combat phase after this one.
When the creature that had Breath of Fury attached dies as an Angel due to Xenograft, Bishop of Wings' second ability triggers, creating a 1/1 Spirit creature token.
When the Spirit enters the battlefield as an Angel due to Xenograft, Bishop of Wings' first ability triggers, causing you to gain 4 life.