"Piece Golem" (ピース・ゴーレム Pīsu Gōremu) is a series of EARTH Rock monsters designed to swarm the field that were released in the booster pack, The Duelist Genesis. The "Piece Golems" are shown in the Yu-Gi-Oh! 5D's series being used by Jack Atlas.
"Medium Piece Golem" and "Small Piece Golem" can Special Summon one another. If "Big Piece Golem" is on the field, "Medium Piece" can fuse with "Big Piece" to form "Multiple Piece Golem" which also has a built-in "De-Fusion"-like effect, allowing you to swarm the field if you Summoned it from your hand. "Big Piece" can also be Normal Summoned with no Tributes if your opponent controls a monster and you do not. The quickest way to use them would be to Special Summon "Big Piece", use its effect to bring out "Medium Piece" and then follow that up by using your new monster's effect to bring out "Small Piece" to boot. If you have a Fusion card such as "Polymerization" with you, use it as the final step to Summon "Multiple Piece" and use all four "Piece Golem" cards in one turn.
Your main strategy with this Deck is to put as many Rock monsters (preferably "Piece Golems") into your grave and either use them with "Gaia Plate the Earth Giant" or cards such as "Call of the Haunted" and "Monster Reborn" to get their swarm effects quickly. Despite the fact that this Deck swarms, it does not Special Summon very much, so cards such as "Fossil Dyna Pachycephalo" will make a perfect addition since it is also a Rock and will be able to negate your opponent's Special Summons and even the game out.