mtg warhammer 40k commander decks ranked 40k: 10 Cards for your Magic: The Gathering Universes Beyond:

The latter two in particular are quite potent, since they can combine powerfully with untap, flicker and sacrifice effects for artifacts or creatures

Colorless isnt a color (its literally a lack of color) and the Tower specifically says that it generates mana of your commanders color identity

Paradox Engine Full Art by Vincent Proce - Pithing Needle Full Art by Joseph Meehan

If youre trying to get your friends into Magic, this is a good product to consider

Card Name Mana Cost Type Artifact Creature Phyrexian Horror Rarity Rare rules Text As this creature enters, choose a nonland card name.Activated abilities of sources with the chosen name can't be activated

Well use the activated ability when someone targets one of our other creatures with removal, replacing it and gaining a little life at the same time