If a component of RoyalCommands states that it supports effect format, then it will use the format detailed below as an argument.
Potion effect format is as follows:
effectName,durationInTicks,level
effectName is a name of a potion effect; these are often displayed by the command using this format.
durationInTicks is a number representing the amount of time this effect will be active for. A tick is 1/20
second, so 20 would be one second.
level is the level of the effect to apply. 0 is the first level, 1 is the second level, and so on.
regeneration,1800,0 - Regeneration I for 1:30 (90 seconds, or 1800 ticks).