
Target spell or permanent becomes blue. (Mana symbols on that permanent remain unchanged.)
Thoughtlace has 12 printings, first in Unlimited Edition (1993). EDHREC ranks it #25,629 among Commander cards. It appears most in Llawan, Cephalid Empress decks (43 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.