Monster tamer stages and spirit power for each stage:
Stage 0: 1-100 spirit power
Stage 1: 101-500 spirit power
Stage 2: 501-3,000 spirit power
Stage 3: 3,001-8,000 spirit power
Stage 4: 8,001-20,000 spirit power
Stage 5: 20,001-40,000 spirit power
Stage 6: 40,001-100,000 spirit power
Stage 7: 100,001-350,000 spirit power
Stage 8: 350,000-1,000,000 spirit power
Stage 9: 1,000,001-5,000,000 spirit power
Stage 10: 5,000,001-20,000,000 spirit power
Monster qualities and spirit power required to used each monster card (Each quality has 1 star to 5 stars):
Iron: 50 spirit power
Copper: 100 spirit power
Bronze: 380 spirit power
Silver: 2,160 spirit power
Gold: 6,500 spirit power
Dark Gold: 13,100 spirit power
Epic: 46,000 spirit power
Legend: 190,000 spirit power
Divine: 980,000 spirit power
Nirvana: 3,000,000 spirit power
Soaring: 10,000,000 spirit power
(Note: Level 30 iron quality 1 star monster is equal in strength to level 27 iron quality 2 stars monster, which is equal to level 24 iron quality 3 stars monster and so on. Level 30 iron 1 star monster is equal to level 10 copper 1 star monster and so on. Each star difference is 3 levels, except for the star difference from 5 star to the next quality 1 star, it's a difference of 8 levels.)
Steve's type of cultivation and their realms and their spirit power for each realm:
Body Refinement: 0-100 spirit power
Foundation Establishment: 100-400 spirit power
Core Formation: 400-1,000 spirit power
Nascent: 1,000-5,000 spirit power
Rejuvenation: 5,000-20,000 spirit power
Martial King: 20,000-100,000 spirit power
Saint: 100,000-400,000 spirit power
Emperor: 400,000-1,000,000 spirit power
Holy Emperor: 1,000,000-5,000,000 spirit power
Ascension: 5,000,000-20,000,000 spirit power
False God: 20,000,000-50,000,000 spirit power
Pseudo God: 50,000,000-100,000,000 spirit power
True God: 100,000,000-200,000,000 spirit power
Golden Immortal: 200,000,000-500,000,000 spirit power
Heavenly Immortal: 500,000,000-1,000,000,000 spirit power
Deity Transformation: 1,000,000,000-10,000,000,000 spirit power
Immortal Saint: 10,000,000,000-40,000,000,000 spirit power
Immortal King: 40,000,000,000-90,000,000 spirit power
Immortal Emperor: 90,000,000,000-200,000,000,000 spirit power
Paragon Immortal: 200,000,000,000-1,000,000,000,000 spirit power
Half-step Immortal God: 1,000,000,000,000-??????????????? spirit power
Immortal God: ???????????????? spirit power
(Note: Steve's current cultivation is Half-step Immortal God. The numbers for Steve's cultivation are kind of irrelevant, you just need to know that Steve has just about unlimited spirit power compared to the people in the Infected Havens. And yes, I just wanted you to know that Steve is overpowered.)