Units could function by means of a population limit of 25 personnel, or a maximum of eight units could be on the field at once, whichever limit is reached first. Larger units such as Scarabs could occupy 9 personnel, which would allow for a maximum of two Scarabs on one side of the field while also taking gameplay into account. A player has never had to battle more than two Scarabs simultaneously. This would also allow for smaller support units such as Ghosts or Choppers, which were also present in Scarab fights.
If you're building a computer program for this card game, I have a few ideas for battle mechanics which determine accuracy and damage. But if not, then I will not disclose them here.
With that being said, here's my card:
Onyx Sentinel
Forerunner
HP
6
Attack/Defense
3/3
Personnel Occupied (if personnel concept is used)
4
Effect
If this Onyx Sentinel does not have at least 5HP, this effect cannot be activated. This Onyx Sentinel may combine with up to two other Onyx Sentinels to operate as a single stronger unit. When combining Onyx Sentinels, add up each Sentinel's current HP and Attack and Defense stat, and apply each stat to the combined Sentinel. Once combined, the new Sentinel cannot separate into its component Onyx Sentinels.
Description
A vicious protector of a Shield World, Onyx Sentinels are capable of decimating Covenant fleets effortlessly. After the Battle of Onyx, it is unknown how many Onyx Sentinels are left.