Youll want your Urzatron lands Urzas Tower, Urzas Power Plant, and Urzas Mine to fuel your artifact army, along with the other usual suspects, such as Grand Architect, Renowned Weaponsmith, and Vedalken Engineer, or the lesser-known Soldevi Machinist
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
If Blaziken can live a hit, it can trade positively, which is the strongest potential the card offers
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
This can make it great to assist in delirium when milled but useless when it never sees the graveyard