Betor, Kin to All + Wound Reflection

Prerequisites

Creatures you control have total toughness 40 or greater.

Steps

1. At the beginning of your end step, Betor and Wound Reflection trigger.
2. Resolve the Betor trigger, causing each opponent to half their life total, rounded up.
3. Resolve the Wound Reflection trigger, causing each opponent to lose life equal to the life they've lost this turn.