Breeding guides (sorry this is spam, but there are no forums):
Tier 2s:
Moth+Fish=Crustacean
Lizard+Fish=Toad
Bird+Lizard=Raptor
Wolf+Bird=Owlbear
Wolf+Moth=Spider
Tier 3s:
Toad+Wolf=Walrus
Raptor+Wolf=Mammoth
Owlbear+Wolf=Steed
Moth+Owlbear=Hornet
Spider+Fish=Calamari
Crustacean+Lizard=Crocodile
Tier 4s:
Crocodile+Raptor=Dragon
Walrus+Toad=Tortoise
Mammoth+Owlbear=Gorilla
Steed+Mammoth=Lion
Hornet+Crustacean=Mantis
Calamari+Spider=Hydra
Tier 5s:
Dragon+Tortoise=Wyrm
Gorilla+Lion=Cerberus
Mantis+Hydra=Beholder
+ This so others can read and learn!
If you set sensitivity high enough, preferably 11, you can do a full turn and you can just keep spinning and going on forever. Well, that's a bit of an exploit for ye.
For late game (like wave 250-300+) e is demonstrating as a multiplication problem, using the following formula:
The # on the left times 1 followed by # on the right zeroes. So 3.378e+92 is equal to 3.378x10^92.
Some of these combinations are funny. You can do Dragon + Human = Dragon + Ash. It's funny because you see the elements and what must've happened. Ahahah Human burned to ash on this one. Try others, they're funny!