Doubt: Do I need to "record in the campaign log" to upgrade? The upgraded versions don't specify it. But they have the "researched" text, and I don't find reference to that in faqs or anywhere (maybe I dunno where to look). Thanks!

EDIT: Found it, I was looking in the Edge campaign guide, and it is in the Investigator's :)

How does this affect the "spend one ammo" part of the cost? Do I have to pay the ammo because the Holster only affects the actual action cost or all of the activation costs?

200 characters. 200 characters. 200 characters. 200 characters

This with Quickdraw Holster gives you three attacks for the price of none!

200 Characters filler text: Lets me think about playing Nathaniel Cho with a gun in the holster and his gloves on. Somewhat funny to imagine him fiddling frantically first to get the gun out of the holster, second struggling to pull the trigger and all that twice in a row. Maybe the enemy is damaged just by watching the process in agony. 200 characters done.

This Discipline has a little cool trick with Brand of Cthugha. (For Discipline anti-treachery battle mage Lily) Normally there is a risk of hitting succeed by 0 and scald you hand. Making Cthugha desirable on your last action. But sometimes when you are fighting multiple enemies with varying even-odd HP and is trying to clear them out as much as possible, you may want to play with the "adjust gas" feature of Cthugha, want to use Butterfly Swords for multiple targets damage distribution, and lastly maybe evade the big remaining guy to have a go again the next turn.

Many times I don't really want Cthugha to be the last action, because its variable damage ability is great to setup a follow up with Butterfly Swords so multiple things dies exactly, or setup for an another investigator to last shot it, or adapt to situation should symbol chaos token shows up and do something weird mid-fight.

Instead of using Cthugha on the last action, use this Disciplined triple attack action on the last action instead. 2 actions prior can be anything except the Cthugha, like your EotE 2 handed weapon of choice (Dragon Pole (get a boost from Cthugha arcane slot), Butterfly Swords (maybe don't exhaust it), Cyclopean Hammer)

Now that you get to take 3 different fight or evade that are not really "additional actions". (Otherwise the wording should be like Daisy ability which gives you real action, but with "which can only be used on fight/evade") You can then position Cthugha anywhere inside this 3 sub-actions. Hitting succeed by 0 would hurt your real action counter outside which had already ran out. You gain flexibility of evading as the last one, or using your 2 handed weapon after Cthugha which is now allowed to safely get succeed by 0.

This in Stella Clark with two Quick Learner lets you kill a 3 fight 3 health enemy in your third and fourth action, provided you don't draw the tantacle. Seems to be a nice combo for expert difficulty.

In your first action you can fail an evade or attack against the enemy to draw cards and/or gain resources to pay for two times Improvised Weapon and trigger Stellas extra action in the process. Of course you have to deal with one attack of opportunity while doing something useful in the second action before you fight the enemy. But have enough cards for tanking damage, even Stellas -ability can heal you later.