D&D 5E Extra Reactions or Not-Quite-Legendary Actions

Reynard

aka Ian Eller
Supporter
One of the designs I use for making creatures more interesting is to give them things to do when it is not their turn. Sometimes I use reactions -- my kobolds are extremely acrobatic little buggers that as a reaction can "roll with it" and take half damage while moving 5 feet if struck as a reaction, for example -- and sometimes I use "legendary" action for not-legendary creatures -- my giant toads can make one tongue attack as a "legendary" action anytime during the round. I build these abilities on a case by case basis, often referencing other sources like the LevelUp Monster Menagerie, or the monster abilities books from DMsGuild or whatever.
My questions are these:
A) Do you beef up your baddies with off-turn abilities? If so, what method do you suually use? What kinds of abilities? Any really fun examples?
ii) Is there a functional difference in play I should consider between deciding on a reaction ability versus a "legendary" ability? I often decide arbitrarily but there's an itch in the back of my mind that says the form might matter.
and
3) I don't usually add too many bonus actions, but if I do they are almost never attacks. Instead I add movement or self healing or aiding another or things like that. Do you utilize bonus actions as much, more or less than reactions/legendaries?
 

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AoE attacks are always good addition to any adversary that can reasonably make them.
Acid flasks, exploding oil, grenades, arrow storms, whirlwind attacks, etc...
 

Low level monsters (which is obviously relative to the party level) I don't bother messing with the stat blocks too much. The CR rating is hopelessly broken below 1 and above 7 or 8. But Action Economy demands that BBEG's must have minor LA's. A DM's choices are either give the BBEG minions/lair actions (which can slow combat to a crawl), or LA's.

Any BBEG that loses the initiative and has its turn near the end will be almost always be wiped out in a trivial manner if it is without minions and/or no LA's.

Options that work well with casters are things like the ability to cast Cantrips back at the attackers, where each Cantrip is 1 LA point.
For non-magic casting BBEG's, it is all about LA's that give non-opportunity attack movement, or the ability for the monster to attack with a claw/bite/or tail on a attack against it.
 

Low level monsters (which is obviously relative to the party level) I don't bother messing with the stat blocks too much. The CR rating is hopelessly broken below 1 and above 7 or 8. But Action Economy demands that BBEG's must have minor LA's. A DM's choices are either give the BBEG minions/lair actions (which can slow combat to a crawl), or LA's.
I'm less worried about CR than I am about enemies being interesting.
Any BBEG that loses the initiative and has its turn near the end will be almost always be wiped out in a trivial manner if it is without minions and/or no LA's.
yeah, I had a hard lesson in this with one of my first "Epic Final Battles" with a dragon that turned out to be the most boring, low stakes fight ever. I didn't really review the rules as well as I should have and was coming off the "knowledge" I had from 3.x/PF and it was... underwhelming.
Options that work well with casters are things like the ability to cast Cantrips back at the attackers, where each Cantrip is 1 LA point.
For non-magic casting BBEG's, it is all about LA's that give non-opportunity attack movement, or the ability for the monster to attack with a claw/bite/or tail on a attack against it.
One I like is giving casters an ability to cast spells as a "legendary" action but with a recharge based on the spell level (either equal or half the spell level cast, depending on the "scale" of the adventure/campaign/encounter). This lets them get more of their interesting spells out in what usually ends up a pretty short (in number of rounds) encounter.
 


I'm less worried about CR than I am about enemies being interesting.

yeah, I had a hard lesson in this with one of my first "Epic Final Battles" with a dragon that turned out to be the most boring, low stakes fight ever. I didn't really review the rules as well as I should have and was coming off the "knowledge" I had from 3.x/PF and it was... underwhelming.

One I like is giving casters an ability to cast spells as a "legendary" action but with a recharge based on the spell level (either equal or half the spell level cast, depending on the "scale" of the adventure/campaign/encounter). This lets them get more of their interesting spells out in what usually ends up a pretty short (in number of rounds) encounter.
I did not want to hammer you with details, but for most of my caster BBEG's, I have found the following works:
1 LA pt = Cantrip
2 LA pts = 1st level spell
3 LA pts = 2nd level spell

If a BBEG has 3 LA pts, well, it can be interesting.

There is also the fact that a "low level" BBEG might only have 1 LA point, while a high level one might have 4, 5, or even more. The only thing that can teach you what is balanced is general experience playing and DM'ing, and specific experience with the party you are DM'ing for.
 

I did not want to hammer you with details, but for most of my caster BBEG's, I have found the following works:
1 LA pt = Cantrip
2 LA pts = 1st level spell
3 LA pts = 2nd level spell

If a BBEG has 3 LA pts, well, it can be interesting.

There is also the fact that a "low level" BBEG might only have 1 LA point, while a high level one might have 4, 5, or even more. The only thing that can teach you what is balanced is general experience playing and DM'ing, and specific experience with the party you are DM'ing for.
Just to be clear, I am not talking about BBEGs generally. I do this with ALL of my monsters, because 5E monsters are boring.
 



Just to be clear, I am not talking about BBEGs generally. I do this with ALL of my monsters, because 5E monsters are boring.
There are some very good 5e monsters. The Elder Oblex I find very very cool. The problem is that most 5e monsters are terribly statted out. Try this on for size. Take a CR 15 Dragon. I automatically give Youngs and above some level of spell casting, because, well Dragons....If you go by RAW, a CR 15 and above Dragon can cast Far Step. THAT spell alone can turn an encounter into something incredibly challenging for a party.
 

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