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While locking Rooms seems strange at first, some Rooms only trigger when they are unlocked, Marina allows you to re-use those effects
Information-related: You can force your opponent to use a spell or ability before they know how you're going to block, or check to make sure a spell or ability of your own resolves the way you want it to before making a block
It also has a bonus ability to create a 10/10 creature token, should you need it
While it was a super-close battle, in the (bitter?) end, it was Bitter Ordeal coming out on top
Pokemon TCG: Raging Surf Booster Box Korean Product information 45.70 Description Discover the excitement of the Pokmon TCG Raging Surf Booster Box (Korean edition), part of the globally popular Pokmon Trading Card Game