Ok I though of a combo that I think is good but i could be wrong so Its all about
Loteth troll so turn 2 lotleth Troll then throw away a gravecrawler for his effect and/or Slitherhead and use Siltherhead's scavenge effect so you have a 5/4 on turn two with trample and you can cast grave crawler next turn tell me what you think.
I think it's a bad idea to build a deck around Lotleth's discard ability. The reason the troll is good is because he's cheap and he regenerates for cheap. There is nothing wrong with swinging in for 2 every turn (maybe pop Rancor on him if you want a "combo"). Lotleth is going to be in the format regardless, so I have a feeling people are going to be packing stuff like Tragic Slip so that they won't get beat by a 5/4 Troll. And if they can kill him after you've discarded 2 cards to his effect, you've effectively been 2 for 1d (3 for 1d if you aren't using Gravecrawler as one of the creatures).
Loteth troll so turn 2 lotleth Troll then throw away a gravecrawler for his effect and/or Slitherhead and use Siltherhead's scavenge effect so you have a 5/4 on turn two with trample and you can cast grave crawler next turn tell me what you think.