Still getting the same bloody error

create table CARDS(
id INT NOT NULL AUTO_INCREMENT,
CardName VARCHAR(50) NOT NULL,
CManaCost INT NOT NULL,
Type ENUM('Creature','Enchantment','Sorcery','Instant','Land') NOT NULL,
Rarity ENUM('Mythic','Rare','Uncommon','Common','Land') NOT NULL,
Color ENUM('None','White','Green','Black','Red','Blue') NOT NULL,
CORE_SETS INT NULL,
DUEL_DECKS INT NULL,
EXP_SETS INT NULL,
PLANECHASE INT NULL,
PREMIUM INT NULL,
REPRINTS INT NULL,
PRIMARY KEY(id),
CONSTRAINT CoreSetFK CORE_SETS REFERENCES CORE_SETS(id)
             ON DELETE CASCADE,
CONSTRAINT DuelDecksFK DUEL_DECKS REFERENCES DUEL_DECKS(id)
             ON DELETE CASCADE,
CONSTRAINT ExpSetsFK EXP_SETS REFERENCES EXP_SETS(id)
             ON DELETE CASCADE,
CONSTRAINT VaultFK REFERENCES FROM_THE_VAULT(id)
             ON DELETE CASCADE,
CONSTRAINT PlaneChaseFK PLANECHASE REFERENCES PLANECHASE(id)
             ON DELETE CASCADE,
CONSTRAINT PremiumFK PREMIUM REFERENCES PREMIUM(id)
             ON DELETE CASCADE,
CONSTRAINT ReprintFK REPRINTS REFERENCES REPRINTS(id)
             ON DELETE CASCADE
);ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CORE_SETS REFERENCES CORE_SETS(id)             ON DELETE CASCADE,     CONSTRAINT' at line 1