Demigods is a new feature added in Taichi Panda. This feature can be unlocked at Level 50. You need Stardusts to raise and/or hatch Demigods, you also need equipment, gold, silderite, and everything you can drop. You can see what the next level will ask you by clicking on the magnifying glass.
There are 5 demigods but for now only 3 are available, the dragon, the tiger and the bird. To raise the dragon you will need to be level 50. But to raise the tiger you will need the dragon level 100 and to raise the bird you will need the tiger level 100.
For the dragon : Level 1-5 : 5 stardust
1) 5 green surge pills 2) 5 blue surge pills
3) leaping runes
4) odin necklace
5) rolling rune
Level 6-10 : 6 stardust
6) bolt rune
7) dragon boots
8) 5 purple surge pills
9) flowing rune
10) soulvoid aura
Level 11-15 : 7 stardusts
11) 1 million gold
12) fire tongue rune
13) divine necklace
14) flash rune
15) 200k silderite
Level 16-19 : 8 Stardusts
16) beasts power
17) boulder rune
18) hell fire armor
19) torrent rune
20) Neptune's armor + 35 Stardusts
Level 21-24: 9 Stardusts
21) slayer boots
22) 1.2 million gold
23) explosion rune
24) 5 orange surge pill
Level 25-30 : 10 Stardusts
25) Shock rune
26) Intrepid boots
27) Land rune
28) Baal chain
29) Icy snow rune
Level 30-34 : 11 Stardusts
30) 300k silderite
31) Myr Armor
32)Sky fire rune
33) 1.4 million gold
34) Slayer Cuffs
Level 35-39: 12 Stardusts
35) Sky wind rune
36) Divine weapon
37) Intrepid Armor
38) 5 weapon exalt seals
39) Beats soul helm
40) champion armor + 50 Stardusts
Level 41-43 : 13 Stardusts
41) 5 awakening pills
42) odin ring
43) 5 lunar tears
Level 44-48 : 14 Stardusts
44) 1.6 million gold
45) 500k silderite
46) Beats heart
47) Sky Earth Rune
48) Myr Ring