It was a regular battle in silver 1
The rule was - Reverse Speed
Mana Cap - 27
As far as I don't have any idea how to play this kind of rule, I decided to go from the opposite and play the highest legendary I have - Sacred Unicorn L3
As far as I decided to boost it with Silvershield Knight, I found out the new melee attack card Cave Slug will be okay as it kicks random low health opponents' cards from any position.
Feral Spirit and a Divine Healer are fitted well for my mana cap!
The link on the battle is here