"The Filigree Texts do not compel you to act in accordance with their precepts. They only specify the consequences should you fail."
—Lodus of the Ethersworn

Memory Erosion

Whenever an opponent plays a spell, that player puts the top two cards of his or her library into his or her graveyard.

Whenever an opponent casts a spell, that player mills two cards.

The List

Commander Anthology Volume II

Whenever an opponent casts a spell, that player puts the top two cards of their library into their graveyard.

Commander 2011

Whenever an opponent casts a spell, that player puts the top two cards of his or her library into his or her graveyard.

"Los Textos de Filigrana no te obligan a actuar según sus preceptos. Sólo especifican las consecuencias si no lo haces."
—Lodus de los etereados