Yuuki

[Start of Your Main Phase] [On Play] By trashing 1 card in your hand, gain 1 memory.[Your Turn] [Once Per Turn] When one of your Digimon attacks, if you have 4 or fewer cards in your hand, it may digivolve into a [Dark Dragon] or [Evil Dragon] trait Digimon card in the trash with the digivolution cost reduced by 1.
[End of All Turns] If you have 4 or fewer cards in your hand, by suspending this Tamer, you may return 1 [Evil], [Dark Dragon] or [Evil Dragon] trait card from your trash to the hand.