Benalish Sleeper (DMU 8)

Creature — Phyrexian Human Soldier • Mana cost: {1}{W} • Dominaria United • Common

Kicker {B} (You may pay an additional {B} as you cast this spell.)
When this creature enters, if it was kicked, each player sacrifices a creature of their choice.

Even he didn't know what he was until he felt his skin shifting and splitting, his mind overtaken by a chaos of whispers.

Illustrated by Josu Hernaiz.