All of the Main Deck monsters have a common effect: "Cannot be Normal Summoned, unless you control a "Ghostrick" monster. Once per turn: You can change this card to face-down Defense Position".
Also, the Xyz Monsters, except for "Ghostrick Socuteboss" and "Ghostrick Angel of Mischief", share the following common effect: "If this card is sent to the Graveyard: You can target 1 other "Ghostrick" card in your Graveyard; add that target to your hand".
"Ghostricks" are either Level (or Rank) 1 Fiend, 2 Spellcaster, or 3 Zombie-Type Monsters, with one Xyz Monster corresponding to each Level combination, except for "Ghostrick Angel of Mischief", who is a rank 4 Fairy-type Monster.
They feature a variety of effects, mostly revolving around flipping monsters face-down (both yours and your opponent's) and protecting themselves as long as they are face-down. The three strata of monsters each follow a set of general effect guidelines:
The Level 1 monsters have effects that trigger while in the hand, and they react to destruction, attacks and damage, providing bonuses and acting like hand traps; design-wise, they share a prankster, infantile appearance, maybe hinting to the "tricks" they play against the attacks of the opponent's monsters.
The Level 2 monsters have effects related to Battle Position control, allowing its controller to search for a monster or stall the opponent's moves; they share a feminine, delicate, appearance.
The Level 3 monsters all provide useful bonuses while they are face-up or when flipped face-up. Their effects range from searching to burning, or even milling the opponent's deck or giving bulk to a "Ghostrick" monster; their motif is basically of male figures of Halloween and Folklore.
The support provided by the on-theme Spell/Trap Cards is also diverse, with effects that range from protecting "Ghostrick" monsters from targeting and destroying effects, switching the battle position of opposing monsters, reviving "Ghostrick" monsters and locking the opponent from Flip Summoning. The only Spell Cards of the Deck is a trio of Field Spell Cards that share the common effect of allowing a player from attacking direcly if all opposing monsters are in face-down Defense Position. They can either search for resources, halve the battle damage and manipulating the battle position of the opponent's monsters.
Most of Ghostrick monsters are Zombies, so it's possible to use support for it in this Deck. "Skull Conductor" can be used to summon "Mummy" + "Des Lacooda" or "Jiangshi" / "Plaguespreader" / "Painter" + "Stein" / "Bone Crusher" for a Xyz or Synchro Summon.
This Deck focus on milling your opponent's Deck and win by Deck out. "Ghostrick Parade" is the only recommended Field because of its searching effect and damage to your opponent is unecessary. Note that sending cards to your opponent's Graveyard may help their strategy, so "Ghostrick Skeleton" and "Masked HERO Dark Law" are used to banish the cards instead.
The 6 Reptile elemental field wipers: "Destruction Cyclone", "Firestorm Prominence", "Silent Abyss", "Radiant Spirit", "Raging Earth", and "Umbral Soul" can also be devastating to a Ghostrick Deck. as they all have 2000 attack and 1500 defense, making them difficult to destroy in the first place, and when they are destroyed, they also destroy any card that is face down, along with anything that does not have the same element as them (WIND, FIRE, WATER, LIGHT, EARTH, and DARK respectively). While this makes "Umbral Soul" slightly less damaging than the others, even it still remains a major threat.
Other cards which prevent battle position changes, whether of the "Ghostrick" player's monsters or the opponent's, such as "Gaap the Divine Soldier" and "Gravity Axe - Grarl" can halt most, though often not all, of the "Ghostrick" player's moves. In addition, a monster Summoned by "Raging Cloudian" will be nearly impossible for the "Ghostrick" player to get rid of.
"Goblin Fan" is a continuous trap that can destroy any monster card that is Level 2 or below the second it's Flip-summoned. This includes about 2/3 of the Ghostrick monsters, and since many of them rely on their Flip effects, rather than raw power, this one trap card can be devastating to any Ghostrick user's strategy.
The "Ghostrick" monster's battle-flipping effects resemble the activities of children pranksters or mischievous spirits: popping out and scaring people, then running away and hiding. This is underscored by the archetype name "Ghostrick" a blatant portmanteau of the words "ghost" and "trick".
The "Ghostrick" archetype was originally released in Shadow Specters, which debuted in the U.S. in November 2013, and may have been intended to coincide with the celebration of Halloween. The "Ghostrick" monsters are largely based on mythological creatures that children in the western world would dress up as for Halloween (witch, ghost, Jack-O'-Lantern, Frankenstein's Monster, Mummy, etc.), and their playstyle (as described above) mirrors the tradition of trick-or-treating.
"Ghostrick" monsters' artworks share the background scheme with the "Lightsworn"s, as they have the same concept of patterning.