Relentless March

During your upkeep, place a droid counter on Relentless March.
{1}, Remove a droid counter from Relentless
March: Create a 1/1 colorless Battle Droid
creature token onto the battlefield.
{3}, Sacrifice Relentless March: Search your
library for a card named Super Battle Droid and
place it on the battlefield. Shuffle your library.