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There are three pages floating around over on 4chan right now, that include Bio-Artifacts, Psychic-Powers, and Biomorph upgrades.
Of course these are leaked images, and do like always require some salt as to whether or not they are real. They look legit on my first look at them and here are a few of the highlights on the pages and of course a link.
http://boards.4chan.org/tg/res/29352961
via anonymous over on 4chan
Bio Artefacts of the Tyranids
1.The Maw-Claws of Thyrax- S: user AP5 Melee, Assimilate (can give preferred enemy), rending
2.The Norn Crown- Increases synapse 6"
3.The Miasma Cannon
Spit: Rang 36" S1 AP4 Assault 1, blast, poisoned 2+
Spray: Template S1 AP4 Assault 1, poisoned 2+
4.The Ymgarl Factor- Can choose a new ability every assault phase, Slashing Claw, Tentacled Limbs, Protective Carapace
5. The Reaper of Obliterax- S+1 AP3 Melee, Life Drain (rolls of 6 have instant death), Shred, Swiftstrike (+3 init)
Powers of the Hive Mind
Primaris: Dominion-6" additional synapse
1. Catalyst : FNP
2. The Horror: pinning test
3. Onslaught: Unit can run and shoot
4. Paroxysm: Targets WS and BS lowered
5. Psychic Scream: Nova power; 2d6+2 vs ldrship or take difference in wounds
6. Warp Blast: Burst 24" S5 AP3 blast, Lance 18" S10 AP2 lance
Biomorphs
Acid Blood- Initiative check or take damage
Acid Maw-sacrifice attacks for a single S5 Ap2 attack
Adrenal Glands-fleet, furious charge
Blinding venom-sacrifice attacks for S3 melee blind and poisoned 6+ attack
Regeneration: 4+ to regen
Toxic Miasma: suffer additional hits in melee
Flesh Hooks and Spine Banks: grenades with shooting attack
Toxin sacs: poisoned special rule
Wings: becomes flying monstrous creature
Tail Biomorphs: Bone Mace, Prehensile Pincer, Thresther Scythe, Toxin Spike