The List

Vow of Malice

Enchant creature
Enchanted creature gets +2/+2, has intimidate, and can't attack you or planeswalkers you control. (A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Commander Anthology Volume II

Enchant creature
Enchanted creature gets +2/+2, has intimidate, and can't attack you or a planeswalker you control. (A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it.)

Commander Anthology

Legendary Cube Prize Pack

Commander 2015

"I grant you blades—on the condition that they are not pointed at me."
—Damia, Sage of Stone

Commander 2011

Enchant creature
Enchanted creature gets +2/+2, has intimidate, and can't attack you or a planeswalker you control.