Your search for "Command Tower (1666)" revealed the following:
Command Tower - Brain Dead: Staples (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Jackson Epstein Card Text: Brain Dead: StaplesT: Add one mana of any color in your commander's color identity.
Command Tower (Foil) (CM1) from Commander's Arsenal, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Adam Paquette Card Text:T: Add to your mana pool one mana of any color in your commander's color identity.
Command Tower - Furby: Doo-ay Noo-lah (Confetti Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: SchmandrewART Card Text:T: Add one mana of any color in your commander’s color identity.
Reliquary Tower (TRC) from Star Trek Commander, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: William Phifer Card Text:You have no maximum hand size.T: Add C.
Citizen (006) // Spacecraft Illusion (007) Token (Foil) (TTRC) from Star Trek Commander, available at 401 Games Canada. Rarity: Token Finish: Foil Artist: Charles Chaisson & Enora Mercier Card Text:Spacecraft Illusion: Flying
Beast (004) // Insect (005) Token (Foil) (TTRC) from Star Trek Commander, available at 401 Games Canada. Rarity: Token Finish: Foil Artist: Arthur Yuan & Kevin Glint
Command Tower (C16) from Commander 2016, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Ryan Yee Card Text:T: Add to your mana pool one mana of any color in your commander's color identity.
Command Tower - Brain Dead: Staples (Rainbow Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Jackson Epstein Card Text: Brain Dead: StaplesT: Add one mana of any color in your commander's color...