Got Arctica on 259 might, also dove, anubis, storm, cupid, revenant, treantaur, death knight, medusa, warlock
As Wineman stated you can purchase everything now days, so I have to ask how much did you spend?
F2p you say?.............Your name wouldn't be Darrendota...would it?
Gratz. Although getting Arc now is not difficult task. At least not compared to what i was easier, when only way to get Arc for F2P was Castle Lottery event (no counting Uncover Treasure, but chances there are slim). 28k gems helped, but still getting Arc on F2P acc is not easy task. I know something about it.
F2P accounts get good heroes, just less frequent than gem spenders, because gem purchase gems and roll more often, so statically they will generally get more good heroes. I've blogged a few old accounts that did awesome with some of the spend events. My most recent was a 2 year old account that was sitting around and I rolled Hatma on release day, and took that account from a few k might to 50k in about a month and clearing insane 4-10.
I also have 2 f2p accounts that have a revite 5 arc now. Molt and Arc were pretty easy to get for a while.
OP, congratulations and enjoy your account! You actually achieved arc at 239 might! most likely the lowest might free arc ever!