When you would use this card, reduce its cost by 1 for each Tamer you have in play.
[Main] You may play 1 Digimon card with [Justimon] in its name from your hand without paying its play cost. If you do, delete 1 of your opponent's Digimon with a play cost less than or equal to the Digimon you played.

[Security] You may play 1 black Tamer card from your hand without paying its play cost. Then, add this card to its owner's hand.