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compared to every other up-gradable spawner, magma cubes upgrade costs just seem so absurd for what its worth, and its by far the most expensive...
this could be added as a donor perk or a rank 23 perk. the ability would allow you to upgrade stacks of spawners at once rather then place them...
like you can keep using shop boosters and it will keep adding time the booster is on, so using two 5 minute boosters will give you 10 minutes, two...
add like a command to see different stats about the currently spawned or upcoming boss, like what difficulty is it, its speed and strength ect....