Ryoma Mogami - Across Time (BT12)

[Start of Your Main Phase] If this Tamer has 2 or fewer cards under it, place 1 Digimon card with [Save] in its text from your trash under this Tamer.
[Your Turn] When one of your Digimon would digivolve into a Digimon card with [Save] in its text, by suspending this Tamer and placing 1 card from under one of your Tamers as the bottom digivolution card of that Digimon, reduce the digivolution cost by 1.