the current division of Ranked Play is:

• Wild Format (ability to use all cards + bots allowed + Wild Pass)
• Modern Format (human players only + ability to use only cards from the last two sets)

I play with two accounts because on Splinterlands multiaccount is allowed and so I have two separate energy bars.
It is not allowed to use bots and battle helpers in the Modern Format and that is why it is the only format I like.