From the official Japanese Twitter account, the least popular Royal Knight.

Duftmon

Card NumberBT3-030Level6
Card TypeDigimonPlay Cost12
ColorBlueEvolution Cost4
Digimon TypeHoly Knight/Royal KnightsDP11000
AttributeDataRaritySuper Rare
StageUltimateArtistsasasi
Main Effect[On-Evolution] Play a Level 4 or less Digimon Card from your Digimon’s Evolution Sources without paying the cost.
[During your turn] All of your Level 4 or less Digimon get «Jamming». (This Digimon is not destroyed by battles with Security Digimon)
Source Effect

Booster Set 3: UNION IMPACT will launch in Japan October 30th, 2020. The cards from it will be combined with NEW EVOLUTION and ULTIMATE POWER for the English format, spread across Special Boosters 1.0 and 1.5.