Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Here is my first build on this site and the current build i use for morde in 5vs5 game.
I don't change my play for early, mid or end game, i always harass minions with my 3 powers, the effect of creeping death make the rest (and combine with two sunfire cloak, you clearly don't have to think, just go in the melee!)
This build is for tank and, as i am, a beginner tank cause you're action doesn't really change the fight, with creeping death at lvl 5 and sunrise cloak x2 you cause 200 magic damage/sec around you with a great resistance to magic and damage with armor, magic from items, creeping death and passive power who give you constant temporary hp.
You will bring love by you're teammate and rage by you're opponents :)