Tamer

[Start of Your Turn] If you have 2 or less memory, set it to 3.
[Your Turn] When any of your Digimon with the [Rock Dragon]/[Machine Dragon] trait are played, by suspending this Tamer, 1 of your level 4 or higher Digimon may digivolve into a Digimon card with the [Rock Dragon]/[Earth Dragon]/[Machine Dragon]/[Sky Dragon] trait in the hand with the digivolution cost reduced by 2.

[Security] Play this card without paying the cost.