It's sent into unguilded districts by the Orzhov to collect the souls of those no one will miss.

オルゾフはそれをギルドの支配が及ばない地域に差し向け、嘆く者のいない魂を回収している。

貧民街の刈り取るもの

貧民街の刈り取るものが戦場に出たとき、各プレイヤーはそれぞれクリーチャー１体を生け贄に捧げる。

Slum Reaper

When Slum Reaper enters, each player sacrifices a creature of their choice.

Ultimate Masters

When Slum Reaper enters the battlefield, each player sacrifices a creature.

The outskirts of Golgari territory are guarded by more than just walls.

GRN Guild Kit

Battlebond

Return to Ravnica

As Slum Reaper’s ability resolves, first the player whose turn it is chooses a creature they control, then each other player in turn order does the same, knowing the choices made before them. Then all the chosen creatures are sacrificed at the same time.

If any player controls no creatures, that player simply doesn’t sacrifice anything. Each other player still sacrifices a creature.