Kolossal Killer by Kenton Knepper

Effect

Kolossal Killer allows a magician to perform a powerful card revelation using only their wallet. The effect resembles the classic "invisible deck" but is designed to be carried discreetly in a standard wallet. A spectator names any card, and the magician retrieves it from their wallet as if it was predicted in advance. The method eliminates the need to carry a full deck, making it ideal for impromptu performances.

Full Details

Kolossal Killer was created by Kenton Knepper and has been used by magicians since at least 2007. The method involves a clever way to conceal a card setup within a wallet, allowing for instant access to a selected card. The original version worked best with traditional billfold wallets, but modern adaptations make it possible to use with slimmer EDC (everyday carry) wallets.

The complete bundle includes:

• The original Kolossal Killer instructions
• A 113-page PDF called Killer Konceptions (2010), which expands on additional routines and mentalism applications
• K.E.N.T., a psychological method for determining a spectator's chosen card without physical props
• A one-hour video tutorial featuring Knepper discussing variations and performance tips

Who Should Consider the Trick

Kolossal Killer is ideal for:

• Magicians who want a powerful card trick without carrying a full deck
• Mentalists looking for a convincing way to reveal a thought-of card
• Performers who enjoy impromptu magic and need a reliable method that fits in their pocket

The trick works best for those comfortable with subtlety and psychological presentation. While it doesn’t require advanced sleight of hand, performers should be willing to adapt the method to their preferred wallet style.

Difficulty

The method itself is not technically difficult, but it requires proper setup and familiarity with the wallet being used. Some wallets may need minor adjustments to work optimally. The mentalism applications in Killer Konceptions add depth but also require strong presentation skills.

What Magicians Say

The reviewer, mentalistonashoestring, praises Kolossal Killer for its versatility and strong impact:

• "It's like an invisible deck that fits in your wallet... highly effective."
• "The Killer Konceptions PDF is where the real meaty stuff is—tons of ideas beyond the basic effect."
• "Even if you have a Shadow Wallet, this adds extra possibilities."

They also note that while some magicians initially dismissed the trick, it has stood the test of time and remains a favorite among mentalists and card workers. The reviewer concludes:

• "For $34, you get loads of stuff to play around with... it's a must-have."

Kolossal Killer is a well-regarded tool for magicians who want a compact, powerful method for card revelations. Its adaptability and strong mentalism potential make it a worthwhile addition to any performer’s repertoire.