Creature cost theory

Hypothesis

Creatures start with a 1|1 for free.

Each additional attack gives +1 cost.

Having 5 or more hp gives +1 cost.

Upgraded cards have a -1 to -2 bonus.

All numbers, stats and skills are integers.

0atk is still (0) instead of being (-1)

0hp is a -2 bonus.

duo cost ability is a -1 bonus(?)

immortality is a 1.5* multiplier on attack

vampire is a 1.5* multiplier on attack

voodoo seems to be free

Aether

3atk (2) + 0hp (-2) = 0

5atk (4) + 0hp (-2) + Upgrade (-2) = 0

Immortal (1.5 * atk (4)) + 3hp (0) = 6

Immortal (1.5 * atk (5)) + 4hp (0) + Upgrade (-1) = 6.5 => 7

Immortal (1.5 * atk (8)) + 6hp (1) = 13

Immortal (1.5 * atk (10)) + 6hp (1) + Upgrade (-2) = 14

4atk (3) + 2hp (0) + duo cost web (0) = 3

7atk (6) + 2hp (0) + duo cost web (0) + Upgrade (-2) = 4

4atk (3) + 4hp (0) + spell damage (1) = 4

5atk (4) + 5hp (1) + spell damage (1) + Upgrade (-2) = 4

4atk (3) + 0hp (-2) + salvager (0) = 1

6atk (5) + 0hp (-2) + salvager (0) + Upgrade (-2) = 1

7atk (6) + 4hp (0) + quintessence (2) = 8

8atk (7) + 5hp (1) + quintessence (2) + Upgrade (-2) = 8

Air

1atk (0) + 1hp (0) + air (1) = 1

2atk (1) + 1hp (0) + air (1) + Upgrade (-2) = 0

3atk (2) + 3hp (0) + dive (2) = 4

5atk (4) + 3hp (0) + dive (2) + Upgrade (-2) = 4

9atk (8) + 6hp (1) = 9

13atk (12) + 7hp (1) + Upgrade (-1) = 12

3atk (2) + 7hp (1) + duo cost spawn firefly (3) = 6

3atk (2) + 7hp (1) + duo cost spawn elite firefly (4) + Upgrade (-1) = 6

3atk (2) + 2hp (0) + light (1) = 3

4atk (3) + 2hp (0) + fire (1) + Upgrade (-1) = 3

Darkness

10atk (9) + 5hp (1) = 10

12atk (11) + 6hp (1) + Upgrade (-1) = 11

0atk (0) + 2hp (0) + duo cost burrow (0) + quanta steal (2) = 2

0atk (0) + 4hp (0) + duo cost burrow (0) + quanta steal (2) + Upgrade (-1) = 1

1atk (0) + 1hp (0) + duo cost infect (0) = 0

3atk (2) + 1hp (0) + duo cost infect (0) + Upgrade (-1) = 1

Vampire (1.5* atk (2)) + 2hp (0) = 3

Vampire (1.5* atk (4)) + 3hp (0) + Upgrade (-1) = 5

5atk (4) + 3hp (0) + duo cost stone form (1) = 5

7atk (6) + 3hp (0) + duo cost stone form (1) + Upgrade (-2) = 5

0atk (0) + 16hp (2) + voodoo (0) = 2

0atk (0) + 20hp (3) + voodoo (0) + Upgrade (-1) = 2

Death

10atk (9) + 5hp (1) = 10

11atk (10) + 5hp (1) + Upgrade (-1) = 10

1atk (0) + 1hp (0) + free infect (1) = 1

1atk (0) + 1hp (0) + free plague (3) + Upgrade (-1) = 2

3atk (2) + 3hp (0) + duo cost web (0) = 2

6atk (5) + 3hp (0) + duo cost web (0) + Upgrade (-2) = 3

0atk (0) + 1hp (0) + scavenger (3) = 3

1atk (0) + 2hp (0) + scavenger (3) + Upgrade (-1) = 2

1atk (0) + 1hp (0) + undead (1) = 1

2atk (1) + 2hp (0) + undead (1) + Upgrade (-1) = 1

5atk (4) + 3hp (0) + mummy (0) = 4

5atk (4) + 3hp (0) + mummy (0) + Upgrade (-1) = 3

0atk (0) + 1hp (0) + deadly venom (2) = 2

0atk (0) + 3hp (0) + deadly venom (2) + Upgrade (-1) = 1

7atk (6) + 8hp (1) + aflatoxin (1) = 8

8atk (7) + 9hp (1) + aflatoxin (1) + Upgrade (-1) = 8

Life

10atk (9) + 6hp (1) = 10

12atk (11) + 9hp (1) + Upgrade (-1) = 11

3atk (2) + 3hp (0) = 2

5atk (4) + 3hp (0) + Upgrade (-2) = 2

1atk (0) + 1hp (0) + photosynthesis (1) = 1

1atk (0) + 3hp (0) + photosynthesis (1) + upgrade (-1) = 0

4atk (3) + 4hp (0) = 3

5atk (4) + 5hp (1) + Upgrade (-2) = 3

1atk (0) + 1hp (0) + duo cost growth (2) = 2

2atk (1) + 3hp (0) + duo cost growth (2) + Upgrade (-1) = 2

1atk (0) + 2hp (0) + Venom (3) = 3

2atk (1) + 2hp (0) + Venom (3) + Upgrade (-1) = 3

Time

1atk (0) + 1hp (0) + mono cost deja vu (1) = 1

2atk (1) + 2hp (0) + mono cost deja vu (1) + Upgrade (-1) = 1

Exceptions

9atk (8) + 6hp (1) = 9 < 10 UP

0atk (0) + 4hp (0) + quanta steal (2) + Upgrade (-1) = 1 < 2 UP

1atk (0) + 1hp (0) + duo cost infect (0) = 0 < 2 UP 3atk (2) + 1hp (0) + duo cost infect (0) + Upgrade (-1) = 1 < 2 UP