Whirlwind kick is better for damaging many foes in a larger area in a single round: with call lightning you can only target a 5ft radius per round (so up to 4 medium creatures), while whirlwind kick has a much wider area (60x15 ft). You may hit a good dozen of enemies if they're lined up.
Damage...
I don't think that's how it's supposed to work, although rolling once and comparing the result against multiple ACs is a possible way to speed up the game.
Personally, I'd hate to waste a level 3 spell slot and an action with a nat 1 on the only roll I'd make.
Exactly! Or also on the human side, imagine something The last Airbender, so you have someone doing martial arts and applying also elemental damage, etc. Or Naruto, too, I remember some character was also shapeshifting
This reminds me precisely of a 3.5e (Trailblazer, actually) character one of my friends played during our War of the Burning Sky campaign, back in 2012ish.
The idea was to create a monk/druid so to closely simulate someone fighting with animal inspired styles, which often happens in many chinese...
One thing I really like about A5E are weapon and armor properties, that go quite well beyond 5E.
For instance in case of heavy shields you also gain an expertise dice to dex saves, which is really useful for classes that don't have proficiency in dex saves. Given how common dex saves are, I...
I'd go for simplicity and rule of cool, so stuff that is wielded can be carried over, while stuff that is worn (including shields) cannot.
Also I'd rule that dropping an item is not even an "object interaction" (like opening a door), so you could obtain the same effect RAW: drop item (free)...
There are many narrative ways to overcome this.
In my oldest campaign I had the party encounter a demon that was much stronger than them, and was the BBEG. He DID TPK, but that didn't mean the game was over, as I planned for that in advance and was actually part of the story (the party was no...
That's why I said permanent and unrecoverable. I'm ok if penalties are recoverable. Older editions had level or ability drain that could eventually be recovered. It can even be useful to propel the story, it's a major setback that can become a new focus.
The main issues are about character...
IDK your players I but can ensure you that many players hate the idea of having permanent unrecoverable penalties.
Also, both of the choices you mentioned are useful to prevent death on the short term and to make it much more likely on the long term.
From what I gather based on the whole...
From my experience, many encounters in official 5e adventures suck, big time.
In RoTFM for instance there's an encounter with an alleged CR6 Frost Giant Skeleton that can oneshot crit any character at the level when the encounter happens, and it can come with a hag.
That's only the last one...
I called it a "grapple attack" but maybe it should be called a "grapple check", which is more specific. This way unintended advantages or disadvantages do not get factored in. Also, the auto-fail chance in case of a nat 1 (or auto succeed in case of a 20) is a corner case that can be adjudicated...