Take everything from them. Lives. Flesh. The very gorund they walk on. Only then will your victory be compleat.

Phyrexian Obliterator

Trample
Whenever a source deals damage to this creature, that source's controller sacrifices that many permanents of their choice.

Phyrexia: All Will Be One

"Show me what Norn's sycophants are hiding under all that pretty porcelain."
—Sheoldred

Trample
Whenever a source deals damage to Phyrexian Obliterator, that source's controller sacrifices that many permanents.

Take everything from them. Lives. Flesh. The very ground they walk on. Only then will your victory be compleat.

Phyrexia: All Will Be One Promos

If creatures an opponent controls are dealt lethal damage at the same time that Phyrexian Obliterator is dealt damage, those creatures will be destroyed before that player chooses permanents to sacrifice.