According to Wizards of the Coast, theres a less than 1% chance of finding one of these Future Sight Frame foil cards
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Pokemon Card Scalper is Shocked When Someone Takes His Pokemon Cards from His Cart | UMU
In the right commander deck, this can be upwards of 10-20 damage
That alone opens up unique strategies involving damage modifiers, switching aids, or defensive attachments,essentially doubling the efficiency of Tool-based engines
The same kind of thing could happen with combat tricks or damage