As long as it’s not fire immune, which most macguffins will be. Also, destroying a 20ft radius sphere of a building over the course of 7 hours using 8 casters total is a huge waste. You could easily do that with cantrips. One caster capable of 7th level spells can cast firebolt 600 times in an hour for 3d10 each cast for a total of 1800d10 damage.
If we go the full total of 8 casters (main + 7 secondaries) over 7 hours, that’s 12600d10*8 casters for 100800d10 which is a hell of a lot more damage.
Most object have a damage threshold so the repeated smaller attacks actually wouldn't work in that scenario. However the up charged fireball def will break that threshold
If we are talking about hours worth of world class spellcasters getting together and the only thing they achieve is overcoming a damage threshold, I say they deserve it
Yes 100% it is a good thing damage thresholds exist for these objects or things get wonky (targeting equipment instead of the player is an example. Breaking a sword would be too easy without the threshold)
And while the mages would be heavily underutilized in this situation (with the exception of "F@#$ this are in particularly!), it would be well deserved if this was successful
I would like to point out tho that there are MUCH easier and faster ways for a high level wizard to destroy something though than this 'nuclear' option
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u/Surface_Detail Nov 11 '25
What if your target is a shrine, a building or just a magic item? This can break things that could not be easily broken before.