When Eureka is played and one player puts a permanent with an enter the battle field ability into play, and another puts Treachery into play targeting it, the trigger activates as if the permanent entered the battlefield under the Treachery players control.
When Eureka is played and one player puts a permanent with an enter the battle field ability into play, and another puts Treachery into play targeting it, the trigger activates as if the permanent entered the battlefield under the Treachery players control.