Still getting my feet wet in this game (L32, most heroes are 1-2 stars, a handful of 3 stars) and I'm getting a bit confused about runes. I realize that there are a bunch of different types (attack, power, precision, etc.) and qualities (lesser, improved, greater, etc.). What I'm confused about are "Legendary" runes; I got an achievement yesterday for making an legendary rune, but I'm not sure what exactly I did? I THINK it was a lesser Power rune that I tuned to 5-stars; it got some ability that says "+7% damage in PvP", which is a unique quality I had never seen before.
Can you take a rune of any quality to 5-star status then? Is that 5th star what makes it "legendary"? Is the likelihood of "5-star status" dependent on the quality (i.e., it's easier to get a Greater Rune to 5* than a Lesser)? Finally, it appears that the only way to craft runes is to break down runes of the same quality - i.e., I can shred lesser runes until I'm blue in the face, but I can't make a single improved rune out of the pieces.
If so, do I have to go to Challenge mode/continue in the story to get those higher level runes? I'm on the Lich's "World" in the main game, but have stopped the campaign to slow level (I only run the tower and PvP, and try evo island to see if I get a celestial - if not, then I quit before beating the boss). I've completed 3 straight towers (yay), so I'm getting a feel for it; I'm spending 100K gold/day on the greater summon for 5-6 "EXP-Free" tokens, plus the Yoriks I get from the Tower and the 5 tokens from the daily guild quest. I'm storing up my free Greater Summons, as well as my gems and Honor Summons for 10X summons of each for a hero I want/need.
Thanks for all your help; this forum is awesome.