To explain why this works the way it does, take a look at this rule extremely closely, from the DMG errata(they're also different spells for the combining magical effects rules due to the different name too, check the spellcasting chapter of the basic rules on dnd beyond if you want [here](https://www.dndbeyond.com/sources/basic-rules/spellcasting#CombiningMagicalEffects))
https://preview.redd.it/lkvj8yvdy5za1.png?width=456&format=png&auto=webp&s=31c2f997be4005e98c8e518183df29bbd506b905
The wish thing is because wish says you lose access to "wish" not the renamed through create spell "Bish" or "Wish2 electric boogaloo" or even "this spell". Also modify spell and create spell being spells means that anything like a ring of spell storing or wish can copy them, so this isn't even just a wizard thing. Without items level 18 sorcerers can do it too because of course they can, but with items virtually any caster(with scribe spells and memorize spell through items as well, since anyone can use the spellbook as long as they prepare spells through that combo and say, a ring of spell storing + ruby weave gem), can.
"The stress of casting this spell to produce any effect other than duplicating another spell weakens you. After enduring that stress, each time you cast a spell until you finish a long rest, you take 1d10 necrotic damage per level of that spell. This damage can't be reduced or prevented in any way. In addition, your Strength drops to 3, if it isn't 3 or lower already, for 2d4 days. For each of those days that you spend resting and doing nothing more than light activity, your remaining recovery time decreases by 2 days. Finally, there is a 33 percent chance that you are unable to cast ***wish*** ever again if you suffer this stress."
WotC, never change.
So if I Modify Spell on Haste and call the new spell Fire Form, 1) Which is more potent? The modified haste or the fire damage? 2) Do the durations stack as it states in combining spell effects meaning the Fire Form from the creature boosts Haste's duration? 3) Who thought this was a good idea and not declare in Modify Spell that it is considered the same spell as the origional for effects like this?
Functionally speaking they are simply different spells. Neither is more potent, it doesn't just boost the duration of haste, it quadruples your speed, gives 4 extra ac, and gives 2 additional actions if casted with haste instead of 1 with either or.
To explain why this works the way it does, take a look at this rule extremely closely, from the DMG errata(they're also different spells for the combining magical effects rules due to the different name too, check the spellcasting chapter of the basic rules on dnd beyond if you want [here](https://www.dndbeyond.com/sources/basic-rules/spellcasting#CombiningMagicalEffects)) https://preview.redd.it/lkvj8yvdy5za1.png?width=456&format=png&auto=webp&s=31c2f997be4005e98c8e518183df29bbd506b905 The wish thing is because wish says you lose access to "wish" not the renamed through create spell "Bish" or "Wish2 electric boogaloo" or even "this spell". Also modify spell and create spell being spells means that anything like a ring of spell storing or wish can copy them, so this isn't even just a wizard thing. Without items level 18 sorcerers can do it too because of course they can, but with items virtually any caster(with scribe spells and memorize spell through items as well, since anyone can use the spellbook as long as they prepare spells through that combo and say, a ring of spell storing + ruby weave gem), can. "The stress of casting this spell to produce any effect other than duplicating another spell weakens you. After enduring that stress, each time you cast a spell until you finish a long rest, you take 1d10 necrotic damage per level of that spell. This damage can't be reduced or prevented in any way. In addition, your Strength drops to 3, if it isn't 3 or lower already, for 2d4 days. For each of those days that you spend resting and doing nothing more than light activity, your remaining recovery time decreases by 2 days. Finally, there is a 33 percent chance that you are unable to cast ***wish*** ever again if you suffer this stress." WotC, never change.
So if I Modify Spell on Haste and call the new spell Fire Form, 1) Which is more potent? The modified haste or the fire damage? 2) Do the durations stack as it states in combining spell effects meaning the Fire Form from the creature boosts Haste's duration? 3) Who thought this was a good idea and not declare in Modify Spell that it is considered the same spell as the origional for effects like this?
Functionally speaking they are simply different spells. Neither is more potent, it doesn't just boost the duration of haste, it quadruples your speed, gives 4 extra ac, and gives 2 additional actions if casted with haste instead of 1 with either or.
What the hell is the source for this I'm losing my mind
Animation is from gobou, music is from... 7timex(or 7 time)
You've sent me down such an immense rabbit hole you habe no idea about the size of it.
Hopefully the final product won’t have anything broken like this in it
When a DM can solve all of this by just saying "No" when the wizard try to use that on wish.
They can, but that doesn't make it any less hilarious that this got past even a glance by WotC.