"Celtic Guardian", "Winged Dragon, Guardian of the Fortress #1", "Winged Dragon, Guardian of the Fortress #2", "Guardian of the Labyrinth" and "The Reliable Guardian" are not "Guardian" cards as they do not include 「ガーディアン」 in their Japanese names. As such, the only "Guardian" support card in the TCG/OCG, "Arsenal Summoner", specifically excludes them.
Guardian Sphinx appears as a character in "World Championship 2006", World Championship 2008, and in World Championship 2009, Guardian Angel Joan appears in World Championship 2008, Guardian Eatos appears in World Championship 2011, and Goyo Guardian appears in Yu-Gi-Oh! Duel Arena.
|Ceal||Shooting Star Bow|
|Kay'est||Rod of Silence|
|Tryce||Twin Swords of Flashing Light|
Most of the core "Guardian" monsters have a Summoning condition that prevents them from being Summoned unless their corresponding Equip Spell is already face-up on the field (although they can be Normal Set regardless). "Guardian Eatos" and "Guardian Dreadscythe" do not require their corresponding Equip Spells to be on the field in order to be Summoned, although "Guardian Dreadscythe" is a Special Summon Monster. Due to "Butterfly Dagger - Elma" being Forbidden, "Guardian Elma" can only be Set in the OCG and TCG Advanced Format.
"Guardian Grarl", "Guardian Eatos" and "Guardian Dreadscythe" can Special Summon themselves from the hand.
The Deck primarily relies on a beatdown strategy. After searching the correct Equip Spell with "Arsenal Summoner", said Spells can be equipped to any monster, allowing you to Summon the related "Guardian". Using a card such as "Collected Power" or "Tailor of the Fickle" can help power up the matching pair of monster and Equip Spell, or save the Equip Spells from destruction by changing who they are equipped to. "Guardian Baou" gains 1000 ATK every time it destroys a monster by battle, starting off at 800 ATK though "Wicked-Breaking Flamberge" gives it a 500 ATK boost, albeit at the cost of discarding wen equipping, although it increases the odds of being able to use the effect of "Baou" that negates the effects of monsters it destroys. "Guardian Tryce" is able to Special Summon a monster used for its Tribute Summon when destroyed, though "Twin Swords of Flashing Light" lowers it from 1900 to 1400 ATK if equipped with it at the cost of multiple attacks. "Guardian Ceal" can prove to be detrimental as it sends Equip Spells to the GY as a cost to destroy other monsters on the Field, whereas the "Shooting Star Bow" decreases a monster’s ATK by 1000 and allows for direct attacking. "Guardian Kay'est" is also unaffected by Spell effects, preventing it from gaining the DEF boost when being equipped with "Rod of Silence - Kay'est", making it the worst target for said Spell. "Celestial Sword" can boost a monster’s ATK by 500 and if sent from the field to the GY, can further boost the ATK of "Eatos" herself by 500 for each banished monster; conversely, "Reaper Scythe - Dreadscythe" simply boosts the ATK of "Dreadscythe" itself for the same amount but for each monster in the GYs. "Eatos" can be Special Summoned if you have no monsters in the GY whereas "Dreadscythe" requires the former to be destroyed in order to be Summoned.
One could use "Phoenix Gearfried" to possibly gain a negate during either player’s turn, though like "Guardian Ceal" this comes with the downside of eliminating your equipped cards on top of "Phoenix Gearfried" being a Gemini monster, thus also requiring you to wait an additional turn or use "Catalyst Field". "Hidden Armory" can help search out or retrieve the needed Equip Spell from the Deck or GY respectively, but will also lock you out of your Normal Summon/Set. The presence of "Guardian" Equips can also possibly benefit "Isolde, Two Tales of the Noble Knights", who is easy to Link Summon if using "Marauding Captain" with another Warrior monster, such as "Knight Dai Grepher" which in turn allows oneself to recycle Equip Spells from the GY. "Fairy Tail - Rella" can accomplish a similar search as "Hidden Armory", immediately getting the necessary cards onto the Field though only it can then be equipped with any cards. Lastly, "Immortal Phoenix Gearfried" can serve as a boss monster within the deck, being easy to get into your hand with "Isolde" and easily summonable. "Immortal Phoenix Gearfried" is also able to buff itself to 3500 ATK on top of a handy negation effect. It also uses monsters as Equip Spells and doesn’t target monsters equipped to it by this effect, serving as a nice out to monsters immune to either targeting or destruction.
- The worst weakness of the deck is probably the interaction with its own archetype. Without massive amounts of generic or outside support, all "Guardian" monsters and Spells constantly end up missing either the right monster or the right Equip Spell, which can lead to unbearable bricks.
- The archetype, just like most other archetypes, does not like any form of Summon Negation; therefore, cards like "Vanity's Fiend", "Vanity's Emptiness", "Archlord Kristya" or "Fossil Dyna Pachycephalo" can stop the deck completely.
- Since the archetype is almost completely relying on the combination of Equip Spells and Monster Cards, any form of effect that will either prohibit players from using Spell Cards or delay them will hurt this deck immensely. Examples are "Horus the Black Flame Dragon LV8", "Imperial Order" or "Anti-Spell Fragrance".