flipping a card face-down doesnt cause it to change zones, so it doesnt go back to the command zone unless somebody trades for it
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Now if the UG lands player doesn't have a sufficient landfall threat on the board, he or she can still find value in returning their lands to hand, discarding them for value (maybe to Wild Mongrel, Noose Constrictor, etc., or Turntimber Sower, if not Trade Routes), and having options to re-play them for future landfall triggers or other shenanigans
Proliferate is the most well-known of these, having been introduced all the way back in October 2010 with Scars of Mirrodin, and basically lets you put more counters on anything or anyone that has counters on it
Either way, my Fireborn Knight can only attack one creature
His equipment mirrors the Materia and weapon upgrading system of the game while still playing inside MTG rules, and the bonus he gets from allied creatures' equipment reflects the importance of keeping your party well-stocked and ready for battle as well