Rage, Racist King

{x},{t}: Racism - The only race that can be cast
are Humans and any non-human race on the battlefield becomes untappable. (X is equal to the
number of different races on the battlefield. This effect
lasts until Rage is untapped or leaves the battlefield
and also affects any summoned non-humans.)
—
"Racist? I Was Racist Once. They Locked Me In
A Room. A Black Room. A Black Room With
Darkies. And Darkies Make Me Racist.
Racist?..." -Rage