- This card can be searched by "A Cat of Ill Omen", "Guiding Ariadne", and "Angel Paladin Arch-Parshath".
- Use this card in a "Counter Fairy" Deck.
- This card is useful against the theme that included Special Summons - such as "Infernity", "Black Salvo", "Debris Dragon", "Batteryman Charger" and "Tour Guide From the Underworld".
- This card can be used against cards that have multiple effects that include Special Summoning like "Starlight Road", "Macro Cosmos", "Magical Dimension" or "Swallow's Nest".
- Use this card against the effect of "Drill Warrior" which Special Summons itself from Banished Zone. "Drill Warrior" will stay banished; they will not get to add a Monster Card from their Graveyard to their hand.
- Since this is a Counter Trap Card, it can be used on monsters like "Shining Angel", "Pyramid Turtle", "UFO Turtle", "Masked Dragon" and other monsters that Special Summon monsters when destroyed by battle.
- "Solemn Warning" can be a menace against Pendulum Summoning, as it will stop ALL the monsters being Summoned at once, destroying the strategy in one swoop.
- Generally speaking, it is better to use this card in a Deck with multiple "Wiretap", since if your opponent attempts to Chain "Wiretap" to your "Solemn Warning", your "Wiretap" against their "Wiretap", and the 2000 Life Points spent won't go to waste.
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