“Steelswarm” is an archetype of mostly DARK Fiend-Type monsters with 0 DEF whose main strategy revolves around Tribute Summoning. When they are Tribute Summoned by Tributing a monster(s) of their own archetype, “Steelswarm” monsters gain various effects that can range from Special Summoning to removal.
When Stygian Security is destroyed by battle and sent to the Graveyard, it allows you to Special Summon a Level 1 Fiend-Type monster directly from your Deck.
Use Stygian Security’s effect to Special Summon Steelswarm Scout. Even if your opponent destroys Steelswarm Scout, at the start of your Main Phase, you will be able to Special Summon it back from the Graveyard.
In order to be able to activate this effect, you must control no Spell/Trap Cards and, if Steelswarm Scout is Special Summoned this way, you cannot Special Summon any other monsters for the rest of the turn.
If you control no monsters, you can Special Summon Steelswarm Cell from your hand.
When tributed to summon a Steelswarm monster, Steelswarm Caller special summons a level 4 or lower Steelswarm monster from your deck. Steelswarm Genome counts as 2 tributes for the summoning of a Steelswarm monster, but has terrible stats and must be tributed into Caucastag as soon as you can. You can combo by tributing Caller for Steelswarm Mantis to swarm your field with monsters. With Caller’s effect special summon Steelswarm Genome from your deck to prepare for Caucastag’s summoning. If summoned after this combo, it might be preferable to activate Caucastag’s backrow destruction effect.
When it’s Tribute Summoned by Tributing a “Steelswarm” monster (Steelswarm Cell or Steelswarm Scout), by paying 1000 Life Points, Steelswarm Moth allows you to target up to two cards on your opponent’s side of the field and return them to their hand, whereas Steelswarm Girastag allows you to target a card your opponent controls, send it to the Graveyard and then gain 1000 Life Points.
Both Steelswarm Moth and Steelswarm Girastag have the ability to remove from the field cards your opponent controls without destroying them; their effects can be used to get rid of problematic monsters such as Legendary Six Samurai - Shi En and/or your opponent’s back row, enabling OTKs and/or slowly gaining control of the field.
While it’s true that cards such as Arrivalrivals and Escalation of the Monarchs can be played in order to be able to Tribute Summon Steelswarm Moth and Steelswarm Girastag during your opponent’s turn to disrupt their plays, they usually end up losing a lot of value whenever you are not on the play because of Shi En’s ability to negate their activation.
It should be noted that Steelswarm Moth and Steelswarm Girastag’s effects can be used to return Shi En to the Extra Deck or send it to the Graveyard and enable
Opening with Stygian Security, Steelswarm Cell or Steelswarm Scout and Steelswarm Moth or Steelswarm Girastag is quite important: Restart will allow you to reset a potential weak or unplayable hand.
This Skill has synergy with both Steelswarm Moth and Cosmic Cyclone. You can run a Glossy copy of Steelswarm Cell or Steelswarm Moth / Steelswarm Girastag to be able to draw exactly the card that you need at the right time.