I agree with UM_AaaBattery. The Stop Cards are too unreliable, unless you know you will be seeing a lot of SoA, they really aren't worth putting in your deck. If you look at where the current Stop: (X) ability cards are, you will probably find better cards in that range that are better suited for all around play, rather than a situational card.
as an example, he is a 7/2 Sentinel
, with Stop: Damage +3, so unless I manage to find him in my hand against an opponent with a hand heavy in SoA, he might as well be an Aurelia
. I can find better 2* cards to put in my deck like Lehanne, Morgan
, or Tobbie
. If I wanted to splash another clan in for that 2* slot, I could get Spiaghi
, or any other cord with 7 power, that wouldn't make me regret seeing it in the field unless I draw up against a G.H.E.I.S.T. or Roots