However, there is an important distinction between Genesis Wave‘s “Plop out all the things together,” and Eureka‘s “Plop out all the things one at a time.” In the case of Genesis Wave, all objects enter as a single action, so any replacement effects have to apply based on the game state just before anything enters. That means if you reveal Clone and Primeval Titan, you end up with only one Primeval Titan, and one other creature. If the field was empty before this (so there’s nothing for Clone to copy), you end up with a dead Clone!
With Eureka, the process is significantly different. As you resolve Eureka, you decide which permanent to put onto the battlefield, one at a time. So you put down your Primeval Titan first (which causes it to trigger, but that trigger has to wait until Eureka has completely finished resolving to go on the stack), then your opponent puts out something, then you put down you Clone and can choose to copy Primeval Titan since it has already been on the battlefield for a little while now (this gets you another trigger to put on the stack once Eureka is done). Or you can copy whatever your opponent just put out if you decide you’d rather have a copy of that Griselbrand you just can’t beat. 😉
Today’s Rules Tip written by Josh Stansfield