If a Baron Pit battlefield token is replaced by a Brush token, does playing Baron Nashor again create a new Baron Pit?

Ruling: Yes. When a Baron Pit token is replaced by a Brush token, the Baron Pit is placed in Banishment and ceases to exist because it is a token. Since the Baron Pit is no longer on the board, playing Baron Nashor again will create a new Baron Pit token.

Sequence:

• The Baron Pit token is replaced by the Brush token and placed in Banishment (Rule 438.5)
• Because it is a token, the Baron Pit stops existing once it enters Banishment (Rule 438.6)
• The Brush token can never swap back because the replaced token no longer exists (Rule 438.7.c)
• Baron Nashor's condition "if it's not there already" is now met, so a new Baron Pit token is created

Nuances:

• This interaction can be repeated to create multiple permanent battlefield tokens on the board
• This ruling differs from replacing a non-token battlefield, which would maintain a link allowing the Brush to swap back