There are 3 tiers of creatures, with 3 creatures in each tier. This results in a total of 9 creatures per Castle. There is no weekly replenishment or upgrades; creatures must be constantly built. The same creature can be built every 3 days. You can take 6 units into an army, but they cannot be split within the army (i.e., no single units to absorb attacks), and the limit for each stack is approximately:
Tier 1: 1000 creatures
Tier 2: 100 creatures
Tier 3: 10 creatures
Some hero skills will allow you to take slightly more. With this system, we will have a large selection of creatures to choose from. For example, you can take 3 units of the highest-tier creatures and 3 of the second tier, but this does not mean that the first tier is useless; some creatures will work better based on quantity (e.g., Summon Demons - special demons that are not in the Castle will be summoned, and their number depends on the size of the unit).
Another initiative system: in 1 round, creatures can reliably take turns from 1 to 3 times, depending on their initiative. The initiative itself consists of two numbers (the first: from 1 to 3 - the number of turns in a round) (the second: from 1 to 99 - the order of turns). With each turn or skipped turn, the first number decreases by 1, while the second remains unchanged. Moreover, those who take 3 turns will generally have a lower second number than those who take 2 or 1 turn. For example, the initiative might look like this: (3/8), (2/45), (1/79).
A new parameter: Rage, from 0 to 3 (which will replace Luck and Morale), is gained by taking damage and decreases after attacking and skipping a turn - it determines how a creature will attack and respond to attacks.
0 - Cowardice
1 - Neutrality
2 - Bravery
3 - Rage
It depends on the difference between the attacker and the defender:
Attack Defense
3 - 0 = 3 does not respond to the attack and takes 1.5 times more damage
3 - 1 = 2 does not respond to the attack
3 - 2 = 1 the defender responds after the attack
3 - 3 = 0 simultaneous attacks
Defense Attack
3 - 0 = 3 refuses to attack this target and skips a turn
3 - 1 = 2 refuses to attack this target
3 - 2 = 1 the defender attacks first
3 - 3 = 0 simultaneous attacks