Tempo Blue is not a great color for permanently getting rid of your opponent's cards once they are in play
The most innocuous cards are often the most powerful and this is no exception
It is especially popular among collectors who focus on alternate art cards
RB1-034 R Tamer Alternative Art Ruli Tsukiyono Color Green Cost 3 Card Text 1 [Effect] [Your Turn] When one of your Digimon digivolves into a green card with [Beast], [Animal] or [Sovereign], other than [Sea Animal], in one of its traits, by suspending this Tamer, reduce the digivolution cost by 1
Winds of Qal Sisma is another Fog effect, but as long as you control at least one creature with power four or greater (like Anzrag, Karlach, or Roxanne herself) it only affects your opponent's creatures, providing you safety and letting you swing for damage