For example, if I am casting mending (1 minute) or prayer of healing (10 minutes) or planar binding (1 hour) and someone casts Power Word Stun on me, does that end the spell and I need to start over, or does it just resume when I am no longer stunned? Is it the same for silence or
Bonus question - can I use a reaction to cast a spell while I am casting another spell (so in the example above can I counterspell the Power Word Stun while in the middle of my other casting)?
Bonus question - can I use a reaction to cast a spell while I am casting another spell (so in the example above can I counterspell the Power Word Stun while in the middle of my other casting)?