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Until then, you can give your creatures haste to apply pressure

Originally these effects said they could be used at any time, but this caused some serious issues in gameplay

It can be disruptive

As with other exert cards, in this format youre playing them with stuff with untaps your creatures anyway, so its like you get the benefit at no cost

Its a complicated mechanic for sure, and one of the most individually complex mechanics overall, but not the worst mechanic if you ask me, and at the same time it's easy to grasp since it heavily draws from LotR lore

The Adventure side, Lupari Shield, is a solid defensive spell, giving all your Human creatures indestructible until your next turn, potentially letting them survive through multiple board wipes