Adarkar Valkyrie [Commander 2018] Muraganda target opponent may choose that

target opponent may choose that for each 1 damage that would be dealt to you until your next upkeep

but how could that be

Set: Battle for Zendikar Prerelease Promos Type: Creature — Human Shaman Rarity: Mythic Cost: {R} At the beginning of your upkeep

Set: Modern Masters 2015 Type: Creature — Elemental Shaman Rarity: Rare Cost: {1}{B/R}{B/R} Sacrifice Fulminator Mage: Destroy target nonbasic land

Set: Revised Edition Type: Sorcery Rarity: Rare Cost: {2}{W}{W} Destroy all creatures

Adarkar Valkyrie [Commander 2018] Muraganda target opponent may choose thatSet: Commander 2018 Type: Snow Creature Angel Rarity: Rare Cost: {4}{W}{W} Flying, vigilance {T}: When target creature other than Adarkar Valkyrie dies this turn, return that card to the battlefield under your control. She doesn't escort the dead to the afterlife, but instead raises them to fight and die again.