Ice and Fire is a mod created by Raptorfarian and Alexthe666 that adds a variety of mobs, blocks and items.
Dragons are assholes.
Ice and Fire adds creatures from mythologies to Minecraft.
There are 2 types of dragons in Ice and Fire: Fire Dragons and Ice Dragons. Fire Dragons breathe fire, while Ice Dragons breathe ice. Dragons have 5 growth stages. Stage 1 and 2 are tiny, when it's a baby. Stage 3 is medium-sized. Stage 4 is a adult. Stage 5 is fully grown. More information can be found in these pages: Dragon, Ice Dragon (I&F wiki), Fire Dragon (I&F wiki)
Other than dragons Ice and Fire adds: Snow Villagers, Hippogryphs, Gorgons, Pixies, Cyclops, Sirens, Hippocampus, Death Worms, Cockatrices, Stymphalian Birds, Trolls, Myrmex Workers, Myrmex Soldiers, Myrmex Sentinels, Myrmex Royals, Myrmex Queens, Amphitheres, and Sea Serpents.
Items and Blocks
Ice and Fire also adds many items and blocks.