This is especially true when this cards unblockable status depends on your opponent controlling a Swamp, which they might not
Cleaning the edges is definitely a little time consuming, but to me its literally one of the most satisfying parts of the job
Do note, however, that if you decide to play these cards, they are rather unpopular in casual settings
A small tangent suggests these cards were being signed as early as 2025, and that they can only use characters whose actor was alive to physically sign the card
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Furthermore, simply telling players to ignore that until your next turn is much, much more intuitive than explaining the vagaries of flickering, and there are very few situations where phasing effects need any more thought than that