After playing a while I think I can clarify the runes: Every viking unit is a rune bearer (you'll see this in their description). They mostly start with 1 of each rune (Soothsayers have 2 of each). Each turn you can spend one of those runes to get the buff for *that turn.* Then it's used up. After experimenting with this a bit, I believe the bonuses to attack/defense only impact the base stat. So my slingers with 4 base attack are getting +1 attack, not +5 because they have 20 attack when you add in my stats.

•Rune of Attack: creature receives + 20% to base attack and the base chance of critical hit.
•Rune of Defense: creature gets + 20% to base defense and base health.
•Rune of Luck: the creature has a 10% chance of a second turn after it goes.

Runes refresh every time you start a new fight, or when you cast the level one rune magic spell Runic Word, which gives the unit one of each rune. If you know rune magic, all your troops may randomly get more runes (even if they are non-vikings).

It's hard to believe the Luck rune trigger chance is only 10%. For me it seems to trigger like every other time.

And how does the medal that increases rune effectiveness by 10%/20%/30% affect runes?
Does the highest medal make attack rune give +50% to base attack and give luck rune 40% trigger chance?
Or just +26.666% to base attack and 13% trigger chance.

Good question. I don't have that medal. Once you get to the benefits in question, let us know what happens.

Btw, it could also give +30/40/50% to base attack/crit chance/defense/health. If I had to guess, I would guess that is what happens. As to the other, not sure which it will be.

It's a 1.1/1.2/1.3 multiplier to the effect of the rune. i.e. Attack runes give +22/24/26% damage and crit rate.

It's worth noting that it's very easy to grind this medal every battle. I had the 2nd level before getting off the first island.

It's also worth noting that while the benefit only applies to the base stats of the units, other buffs can work on both. My Berserkers with +1 morale have an 82% crit rate from both Berserk and Attack rune.

While we are explaining runes, what does it mean when you tell the Valkyrie you want her to take over rune management? I don't get any feedback and I'm not going to pick it without knowing what it does. :)

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I don't understand how to activate those runes...
Where on the screen is the button\option to select which rune to activate ?

They are right above the spell book/rage of the valkyries.

There seems to be a bug with the Soothsayer (unit) ability that gives +1 runes to all Vikings. Instead, it gives usually +1 for TWO Runes (like, Attack and Defense) but none to the third. So, maybe it means it gives 2 runes, not +1 to all of the three rune types?

Are you sure? I tried several times with different saves but Soothsayers always give 1 random rune to each unit.
Please make a screen if possible

Thanks! don't know how I missed it...