It featured a skull-and-bones symbol in place of the 10, and was given to players as a way to track poison counters
Key cards to include: Doom Whisperer, Dimir Strandcatcher, Think Tank, Hullbreaker Horror, Sepulchral Primordial, and Sire of Stagnation
Gideon's Reproach 2/10 Puncturing Light 1.5/10 Impeccable Timing 1.5/10 More white combat restricted removal
On top of that, you can play with other players whenever you want
This windowed binder may not soothe the nerves of anxious collectors when one card is reasonably open to view, but it can serve as a handy way to indicate whats inside the binder, and even the window itself is very well protected by the padded cover that surrounds it
I do think a lot of these cards need haste because you only have a single opportunity to swing with them and then they are gone, but maybe that final trigger is more than enough