If a card is exciting enough for a measurable number of people to either build a new deck or submit an updated version of their deck, that is indicative of a larger phenomenon going on
Its bad in the late game, but most taplands are
After activating the effect of Constellar Sheratan, Tribute it to Special Summon Gizmek Misaki, the Avian Apex Ascender, use its second effect to Normal Summon Constellar Pollux, and while you cannot Special Summon anything other than Warriors, you can use the effect of Constellar Pollux to Normal Summon Constellar Kaus, then use the effect of Constellar Kaus to make both Constellar monsters Level 5 to then Xyz Summon the Warrior-Type Constellar Pleiades
:) To answer your question: No, the card acts like "Gladiator Beast's Comeback", where you can use the first effect even if you control no monsters, but gets less useful as you fill your field up with monsters
If codes are ordered with physical items then the physical code card will be sent to you in the post along with the other items on your order