Husk

Husked: when this creature deals combat damage to another creature, that creature gets Husk infection (on
your upkeep, put a -0/-1 counter on this creature. If
this creature dies, put this creature on the battlefield
under the control of the player that infected it, and it becomes a Husk in addition to it's other creature
types.)
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The fact that it looks humanlike makes it twice as horrifying to encounter