Echo Knight + Lucky Feat | Question

So, the question is regarding the Lucky Feats 2nd use.

"You can also spend one luck point when an attack roll is made against you. Roll a d20, and then choose whether the attack uses the attacker’s roll or yours."

Would that function as the Echo? Since the Echo is technically also you, but from a dying timeline that didn’t happen.

Matt Mercer: An Echo Knight is able to tap into those dying timelines and temporarily pull a version of themselves and use it to fight alongside them.

This is also slightly supported by the fact that all the echo’s rolls from attack rolls to saving throws is modified as if it were your real body’s rolls. What are people’s thoughts about this?

Or is it as simple as "If i have the Lucky Feat, well so does my Echo." like it is with the Sentinel Feat?

Still, thoughts on this subject would be appreciated <3

Does the feat War Caster give you advantage on a constitution saving throw made because of Sleet Storm?

One of the benefits of War Caster is:

You have advantage on Constitution saving throws that you make to maintain your concentration on a spell when you take damage.

The spell Sleet Storm doesn’t deal damage, but the game designers still wanted it to make characters in the AOE make a CON save to keep Concentration. So it states:

If a creature is concentrating in the spell’s area, the creature must make a successful Constitution saving throw against your spell save DC or lose Concentration.

I definitely don’t think this is an intended interaction, but RAW, shouldn’t War Caster be useless for this since it says "when you take damage", and Sleet Storm is not a damage dealing spell?

What method can be used to obtain a fifth and sixth “bonus feat”?

The goal is to obtain a total of six feats that clearly have the label of "bonus feat" at first level. The character class is Erudite, which has two first level bonus feats. Taking two flaws grants two more bonus feats.

How can I obtain the last two bonus feats at first level? Is there a race or template which has two features or abilities using the words bonus feat?

Not interested in TOs (theoretical optimizations), or methods which require helper NPCs, or wealth beyond a starting Erudite’s Wealth by Level.

How long do the temporary HP gained from the Aberrant Dragonmark feat last?

The Aberrant Dragonmark feat states:

You learn that spell and can cast it through your mark. Once you cast it, you must finish a short or long rest before you can cast it again through the mark. Constitution is your spellcasting ability for these spells. When you cast the 1st-level spell through your mark, you can expend one of your Hit Dice and roll it. If you roll an even number, you gain a number of temporary hit points equal to the number rolled.

How long do those HP last?

Are there any unexpected problems with this Homebrew feat?

I (the DM) am considering the following feat, after a player asked about an alternative way to use Two Weapon Fighting.

Knife Fighter

You are especially skilled at the use of the Dagger, gaining the following benefits:

  • You gain a +1 bonus to AC while you are wielding a dagger.

  • You can use two-weapon fighting even when the one-handed melee weapon you attack with is not light, so long as the bonus attack is made with a dagger.

  • You can additionally draw or stow a dagger when you would normally be able to draw or stow any one-handed weapon.

  • You do an additional 2 damage when you hit with a dagger.

Obviously, the most direct comparison is to Dual Weilder. The intent of the feat is to allow a character to wield a Rapier and Dagger, or a pair of daggers and not be at a significant mechanical disadvantage over the Dual Wielder with a pair of rapiers.

Advantages I see compared to the Dual Wielder:

  • Marginally less expensive/heavy.
  • More concealable.

Disadvantages:

  • Additional damage is not multiplied on a critical hit.

Are there additional issues I have missed that would make this feat better or worse than Dual Wielder? Are the issues (above or otherwise) likely to cause problems or have interactions I have not forseen?

Can a character with the Defensive Duelist feat who never makes an attack with the finesse weapon still gain the benefit of the feat?

The description of the Defensive Duelist feat says (PHB, p. 165):

When you are wielding a finesse weapon with which you are proficient and another creature hits you with a melee attack, you can use your reaction to add your proficiency bonus to your AC for that attack, potentially causing the attack to miss you.

Assume a spellcaster who has the Defensive Duelist feat is holding a dagger and an arcane focus. For the duration of combat, they cast spells and never make a melee weapon attack. Do they still gain the benefit of the feat?

Does a Monk have any reason to take the Mobile feat?

I am currently playing the Curse of Strahd adventure and we just leveled to 8. I was thinking about taking the Blade Mastery feat (from Unearthed Arcana: Feats) or the Healer feat (PHB, p. 167). A fellow player suggested I take the Mobile feat (PHB, p. 168) for my monk.

Is there any reason to choose the Mobile feat over another possible feat (such as Blade Mastery, Savage Attacker, Durable, Healer) for a monk since they already get increased movement?

My stats are:

  • Str 10
  • Dex 19
  • Con 16
  • Int 12
  • Wis 18
  • Cha 10

I am a half-elf of the high elf variant with the fire bolt cantrip. I have no other feats currently.

Does using the Tavern Brawler feat with a rope give you a 20’+ grapple attack?

If I gain the Tavern Brawler feat, and use it with a rope as an improvised weapon, can I initiate a Grapple at 20+ feet away (depending on the length of rope)

When you hit a creature with an unarmed strike or improvised weapon on your turn, you can use a bonus action to attempt to grapple the target.

So as an action I attack by whipping the rope out, presumably doing 1d4 damage + strength (up to the DM). Then as a bonus action I initiate the grapple by tugging the rope and having it wind around the opponent.

I envision this as a lasso, but I suppose a grappling hook would work too.

How do an ability-setting item and a +1 feat interact?

I’m playing a Half-Elf Lore Bard at level 5, with CON score of 14 after racial bonus.

Yesterday evening, a great oracle gave my character an Amulet of Health, which does the following:

Your Constitution score is 19 while you wear this amulet. It has no effect on you if your Constitution is already 19 or higher without it.

I’m quite happy as my character gain more HP, and my concentration checks will be improved.

In my initial plan, I wanted to take a feat at level 8: resilient (CON) which gives my character +1 CON. I still do, to at least gain the proficiency in Constitution.

If I take that feat, what will be my character’s Constitution score? 19 or 20? Basically, how do a set ability score and a modifier interact?

When planning on D&D Beyond, it says my CON is 19, but is it correct? Why? Which rules are involved here?

Interaction between Subtle Spell, Iniciative and Alert Feat

I’m running a game and I’m trying to gank a few of my players with a Sorcerer with Subtle Metamagic. However, one of the players has the Alert feat which states he cannot be surprised.

My question here is: can I cast subtle hold person with the sorcerer without any interference from the player with the Alert feat? Or does that person has the opportunity do so something about it since he cannot be surprised? Let’s say the Sorcerer is hiding in his hand his arcane focus (a small pearl).

Can I do this without asking my players to roll for initiative?

Thanks!