At the beginning of your upkeep, Axis of Mortaility triggers.
Holding priority, activate Evra by paying {4}.
Cast Humble by paying {1}{W}, causing Evra to have base power and toughness 0/1 until end of turn.
Resolve Evra's ability, swapping your life total with Evra's power.
Resolve the Axis of Mortality trigger, swapping your life total with an opponent's.
The opponent loses the game due to having zero life.

Infinite lifeloss for target opponent

Target opponent loses the game

Evra, Halcyon Witness

Axis of Mortality

Humble

Phyrexian Unlife

Activate Evra by paying {4}.
Holding priority, cast Humble by paying {1}{W}, causing Evra to have base power and toughness 0/1 until end of turn.
Resolve Evra's ability, swapping your life total with Evra's power.
Activate Soul of Conduit by paying {6} and tapping it, swapping your life total with an opponent's.
The opponent loses the game due to having zero life.

Combos with "Humble"