Laplus, Void-Formed

Indestructible, Swampwalk
Nonbasic lands are Swamps. (They lose all other abilities and land types.)
Other black creatures get +1/+!.
Nonblack creatures get -1/-1.
Black spells cost {1} less to cast.
Nonblack spells cost {1} more to cast.
(Front side: Void-Crow Companion)