Calling something a Splinter Twin situation has basically become shorthand for a simple 2-card combo thats starting to take over a format
What are some other examples of this in games or other product categories
Better get that Mulldrifter in the red zone
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This giant artificer can be very effective, allowing you to get multiple ETB triggers off cards like Meteor Golem or dropping two copies of Sol Ring for just 1 mana
Fork is easily one of the most versatile Red cards in M:TG and works with nearly every deck build