1 non-Link Machine monster with 1000 or less original ATK If this card is Link Summoned: You can send 1 face-up Continuous Spell you control to the GY; add 1 "Clockwork Night" from your Deck to your hand. You can target 1 Machine monster with 1000 or less ATK in your GY; Tribute 1 Machine monster, except this card, and if you do, Special Summon that targeted monster in Defense Position. You can only use each effect of "Clockwork Knight" once per turn.