The wish spell is likely the most powerful and risky spells in Dungeons and Dragons. However, using it to do anything other that duplicate spells carries stress (and potentially losing the spell forever). Below I have quoted the relevant information:
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.
However, I want do know if these risks carry over to your mortal form, if you were under the effects of astral projection. Below I have quoted the relevant information:
Your astral body resembles your mortal form in almost every way, replicating your game statistics and possessions.
Your astral form is a separate incarnation. Any damage or other effects that apply to it have no effect on your physical body, nor do they persist when you return to it.
So would casting wish while under astral projection subject your body to stress and possibility of losing the spell wish, after astral projection has ended?