Izzy Izumi & Tai Kamiya

Effect

[Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory. [Your Turn] When any of your other [ADVENTURE] trait Digimon or Tamers are played, by suspending this Tamer, 1 of your Digimon may digivolve into an [ADVENTURE] trait Digimon card in the hand. For every 2 of your Tamers' colors, reduce this effect's digivolution cost by 1.

Source Effect

[Security] Play this card without paying the cost.