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Math Matters
(lemmy.world)
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this post was submitted on 10 Jun 2025
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If the range of Bless is 30ft and the Cleric is 30ft in the air, then any non-zero horizontal distance would technically put them out of range. You don't need to calculate that they are 36.06ft away to know if they are out of range or not.
But do their feet need to be in range or just a single part of their body?
Depends on which part of them needs to be blessed?
The opposite of that happened to Achilles
Except the game uses Chebyshev distance, so as long as they're within 30 feet in the x, y, and z dimensions, they're within 30 feet.
Though for area damage spells, it's much, much more complicated. You don't just have to find the Euclidean distance from them to the center. You have to calculate how much of their square is within that distance.
That's an optional variant rule described in Xanathar's Guide. The default rule for grids is simpler: just do Chebyshev.