- Can I use Houndoom's "Single Strike Roar" Ability if all four Single Strike Energy cards are in play or in the discard pile?
- No you cannot. Since the location of all four Single Strike Energy cards are known, there's no way Single Strike Roar would be able to find one during a deck search.
Source:
TPCi Rules Team (2021-03-25)
Relevant cards
Note: All applicable cards may not be listed below.
SWSH5_96
SWSH5_141