Dredge is an extremely polarizing but awfully effective mechanic, and Troll is a big part of any Dredge deck where it is legal
These needle-nosed creatures share their abilities, so the more you play, the better they all become, until you eventually have an army of unstoppable super monsters
I think it sits on this list for its ability to be enjoyable to play against (or lackthereof) rather than its ability to win the game decisively
You can also target creatures that draw such as Mulldrifter or Cloudkin Seer to draw your entire deck
Yawgmoth's Will ($245) Not only is Yawgmoth's Will a Reserved List card, but its also still a very competitive one
Its a decent card in play200 HP is nothing special, but it does a ludicrously powerful 300 attack (via three different color Energies) and has an Ability that prevents it from being knocked out from full HP in a single hit