Flat back- Fast reptiles able to bend space when on the move making them hard targets, stable firing platform.
1,000 Credits for breeding population
Bloom bee- Bees capable of massively boosting a plants growth rate, either for farming or for battlefield preparation. Goes well with the more dangerous Avernite Flora.
20,000 Credits for breeding population
Bolehs spider- Highly friendly giant spiders ranging from the size of a knight tot he size of a warhound with the strength and toughness to match. Possess a devastating poison that can be injected or sprayed.
100 Credits per pack or 4,000 Credits for breeding population.
Sotek serpent- Magma Wyrm sized serpents with a range of daemonology powers, lightning speed and the second most deadly known poison. Makes up for its comparative fragility with its speed and powers.
2,000 Credits each (max 10)
Sluggish Sloth- A four ton creature that stores up its strength allowing for brief bursts of incredible speed and strength. 2
0 Credits each or 5,000 Credits for breeding population.
Dread Saurian- Battle Titan sized reptiles with enhancement biomancy allowing them to tear apart even Titans, and shrug off all but the most powerful of attacks.
5,000 Credits each (max 10)
Psyrodactyl- The bane of the Biologis and one of the most common predators of the Avernite skies.
15,000 Credits for breeding population.
Salamander- Lizards that act as crew served weapons in the Lizardman armies, able to slay foes at range with bursts of corrosive flame that can breach all but the strongest of armours.
2,000 Credits for breeding population.
Razordon- Lizards that act as crew served weapons in the Lizardman armies, able to slay foes at range with volleys of venomous, barbed spines that can spell doom for any lightly armored foe.
2,000 Credits for breeding population.
Stegadon- Incredibly tough reptiles the size of a Battle tank, often carries skink light artillery to war.
3,000 Credits for breeding population.
Carnosaur- Smaller version of the Dread Saurian, only the size of a carnifex.
100 Credits each (max 200)
Cold One- Horse sized riding beast. Reasonably fast and agile, tough for its size, even by Avernite standards, and utterly tireless.
1,000 Credits for breeding population
Flat Back - Breeding Population (1,000 Cr)
Bloom Bee - Breeding Population (20,000 Cr)
Bolehs Spider - Breeding Population (4,000 Cr)
Sotek Serpent - *10 (20,000 Cr)
Sluggish Sloth - Breeding Population (5,000 Cr)
Dread Saurian - *10 (50,000 Cr)
Psyrodactyl - Breeding Population (15,000 Cr)
Salamander - Breeding Population (2,000 Cr)
Razardon - Breeding Population (2,000 Cr)
Stegadon - Breeding Population (3,000 Cr)
Carnosaur - *100 (20,000 Cr)
Cold One - Breeding Population (1,000 Cr)
I'm just going to assume these are in aggregate game-changing useful.
(1+20+4+20+5+50+15+2+2+3+20+1)*1000=143k Credits