Ryutaro Williams (Digimon Liberator Debuggers Set)

[Start of Your Main Phase] If your opponent has a Digimon, gain 1 memory.
[Your Turn] When one of your Digimon with [Tyrannomon] in its name attacks, by suspending this Tamer, that Digimon may digivolve into a Digimon card with [Tyrannomon] in its name or the [Dinosaur] trait in the hand with the digivolution cost reduced by 1.
[Security] [Security] Play this card without paying the cost.