Isolation

Improvise When this creature enters, if {W}{W}{W} was spent to cast it, put up to one target nonland permanent on the bottom of its owner’s library. When this creature enters, if {U}{U}{U} was spent to cast it, create a 3/3 colorless Simulacrum artifact creature token with changeling and protection from creatures. When this creature enters, if {B}{B}{B} was spent to cast it, search your library for a card, put that card into your hand, then shuffle.