When Battle for Zendikar came out, I made a deck for Omnath, Locus of Rage that was based around making elemental tokens and sacrificing them to create tons of damage triggers. It was fun but lately I've had a hankering to turn it into a more (nontoken)creature-based deck that could work magnificently with a Genesis Wave. The deck will still put out loads of tokens but the dominant focus has shifted away from it. Of note, there's a lot of emphasis on permanents, so you won't see a Rampant Growth here because Sakura-Tribe Elder can do the same thing and is still useful in a G-Wave.
The point of the deck is to play fast and hit hard. Ramping is especially useful aside from making available mana, it triggers Omnath's Landfall ability, giving you oodles of 5/5 bodies. Lands that sacrifice for another land are especially useful as they give us two or three Landfall triggers in one turn. (Note: using Crucible of Worlds can throw this into overtime.) To take advantage of this, we have lots of haste enablers so you can get an attack in quickly rather than waiting a turn cycle to get any offensive value out of the tokens, plus Warstorm Surge and Where Ancients Tread to go straight for the life total.
There are lots of sacrifice effects to primarily make use of Omnath's second trigger. The combination of Omnath and a sac outlet makes our tokens into ammo to remove creatures or planeswalkers or to decimate life totals. These sac outlets have additional uses too, like ramping and gaining card advantage. Don't be afraid to turn tokens as sac fodder for more value.
Cards to Consider Evolutionary Leap - An excellent sac outlet that provides more card advantage, this would've gone in already had I had a copy. Chandra, Flamecaller - Her +1 puts two Elemental tokens onto the field, which, provided we have a sac outlet, can be cashed in for two free Bolts from Omnath. Plus, her 0 ability can be useful if our hand gets stalled. Ulasht, the Hate Seed - In an ideal world, we G-Wave, have loads of creatures and lands hitting the field (creating loads more tokens), then Ulasht hits as something ridiculously large and we use Ulasht's activated ability to turn him into a pseudo Fireball. Spearbreaker Behemoth - We've got lots of stuff with 5 or more power. Gruul Ragebeast - Each Landfall trigger becomes removal on top of a token. Second Harvest - Doubling the bodies on the field at instant speed sounds pretty nice. Rampaging Baloths - He does part of what Omnath does, but for 4/4 Beasts. Nylea, God of the Hunt - Trample is a great thing to have. Pathbreaker Ibex - Works pretty well when he's attacking alongside a swarm of 5/5s.
Questions, comments, and constructive criticism is appreciated.
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The thing with going permanent only, is that you're super susceptible to any sort of counterplay whatsoever. What if your commander gets countered? What if someone resolves Akroma's Vengeance? What if someone has a combo, or attacks you with Eldrazi? Being all permanents usually means you can't do anything about that, so you must have some removal and choose it wisely.