Ohmrogg's Clutch
Legendary Land - Forest
As you play Ohmrogg's Clutch Sacrifice a Forest. If you do not, put Ohmrogg's Clutch into your graveyard.

: Add

to your mana pool.

: Tap Target unblocked creature, that creature does not untap durring its controler's next untap phase. (this does not take that creature out of combat)
Ohmrogg's Lash
Legendary Land - Swamp
As you play Ohmrogg's Lash Sacrifice a Swamp. If you do not, put Ohmrogg's Lash into your graveyard.

: Add

to your mana pool.

: Target attacking creature gets -1/-1 until end of turn.
Ohmrogg's Maw
Legedary Land - Mountain
As you play Ohmrogg's Lash Sacrifice a Mountian. If you do not, put Ohmrogg's Maw into your graveyard.

: Add

to your mana pool.

: Target creature with power 1 or less is considered blocked.
Sacrifice Ohmrogg's Maw, Ohmrogg's Lash, and Ohmrogg's Clutch: Put a Legendary 12/7 colorless Ohmrogg token into play with Fear.
Basically, as you could guess from the flavor of the card. There's this Giant nasty mo-fo creature trapped inside the earth. As he trys to escape the earth (or as you try and free him), various parts of his body poke through and trash around. Then when the time comes, he emerges to beat face.
12/7 Fear is rather insane... but look at what it takes to play. At a minium you need: a swamp, a mountan, a forest, each of the 3 lands. So that mean he attacks at the very very earliest on turn 7 (aside from fastbond effects). As far as limited goes, each of the lands are situationally good on thier own, even if you don't run other other 2 lands. You could easily pop in 1 type of these lands into mono-color decks just to get the land bonus (esp the black one).
Legendary Land - Forest. how do we feal about this? Clearly its not a basic but either are duel lands. As far as flavor goes, what I had in mind was: you have a forest, then a Giant Claw and forarm burst forth from the Forest... Its still a forest, but now its a forest with a giant arm in it. We do run into a slight Flavor hic-up when we through duel lands into the mix, but I don't want to through the word "basic" in there just to take that away.
I kept them all legendary because the creature himself is legendary... Also even though he has 2 arms, if you end up createing the token... you would only have to sac one arm, and then... well you have a legendary token but one of his arms is still in the ground. Also haveing the Lash in multiples could be too good powerwise.
I had an Idea to make them Enchant - [Land Type]. But that made him to easy to get down turn 4 or 5ish. I kinda like the idea that this creature is paid for in land drops rather than mana cost. Because lets face it there are way more cards that cheat mana cost than cards that cheat land drops.