Posts from Heroic jargon and slang. Auto-translated

What is meant by the terms "treasure" or "minitreasure"?

It seems to be mapmakers' slang.
Treasure - "treasure," a type of artifact of mediocre quality.
Mini-treasure - "tiny treasure," a smaller treasure (a type of artifact, simpler than a regular treasure).
POSSIBLY ALSO:
Treasure - "treasure chest."
Mini-treasure - the same chest, but with a minimal value (1000 gold OR 500 experience, I think).

It heavily depends on the context.

what is a KV, DD?

KV - Air Book (I don't know why it's called Air and not Water), DD - Dimensional Door.

Added after 8 minutes

What is meant by the words "treasure" or "minitreasure"?

It's a place where you can get a lot of angels, wyverns, good, and even excellent artifacts, but you might also get nothing. :( If you go there in the second or even third week with a small army and/or a weakly (poorly) leveled hero (not on Jebus), they might beat you up, especially if the neutrals have high morale... :( A "minitreasure" is usually smaller than a "treasure," but that's not always the case.

Oh, damn it!
You're right. My bad.
Comrade Hermit probably expressed it more accurately.

In this context, Hermit is certainly right, but the word "treasury" did indeed come from the word "treasure" (more details).

Please don't think I'm just spamming, but I even registered just for this topic.
The "Heavenly Enlightenment" helmet in Heroes 3 was ALWAYS called a "teapot."
An alternative to "Chain Lightning" could simply be "tea" or "masslight."

Also, regarding spells, there are "massslow" (general slow or expert slow) and "masshaste" (general haste or expert haste).
The prefix "mass-" can generally be added separately to mean something general or expert ;-)

+ The expression "to champion" = to upgrade cavalry in the stable to champions.

Chain Lightning is found much more often than the Helm of Celestial Enlightenment, so no one cares about it; everyone just calls it the Chain Lightning teapot.

I completely disagree. Chain Lightning certainly appears more often, but despite that, it's rarely used because Mass Slow, Mass Haste, and far more useful spells exist (Solsmyr we'll consider an exception). And if it does come down to using Chain Lightning, chances are there's a Helm somewhere or someone has it. So there's more talk about the Helm as a helmet than about Chain Lightning.

Online, Chain Lightning is seen only on XL maps; on small and similar "elf" maps, Mass Slow, Mass Haste, and other useful spells are used and demanded much more frequently. And you crack open one or two Dragon Utopias — and lo and behold, the Helm might drop. ;-) I've been playing Heroes 3 since '99, and as long as I can remember, I always called it the "Teapot" (Helm), and only later, when I got to the internet, I confirmed the well-deserved name for the SHP — the Teapot Helm or simply Teapot.

At any rate, unlike Chain Lightning, it actually looks like a teapot. :D