If a creature is already attacking or blocking when it's detained, it won't be removed from combat
In addition, some MTG formats are directly impacted by rarities, such as Pauper, Peasant, and their relatives
That said, Lynde, Cheerful Tormentor does the thing
Although I made a functioning deck I wound up massively culling all bar one of the dredge cards and wouldn't feel like it was missing much if the last one went as well
This is a great card for control builds that benefit from having ample spells as well as one or two Planeswalkers with which to defend themselves while they slowly etch their path to victory
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