That's right. It's been just over 20 years since the last time we printed a card with phasing, but it's back. Enjoy it, but don't get used to it. It's every inch the same bizarre and not-very-fun mechanic it always was, but it did the job here.
Phasing? Really?
So how'd we get to phasing?
Commander, and our other multiplayer-focused products, often have cards where there's something specific the designer wants to do but prioritizes a grokkable, intuitive card over having the edge cases work one specific way or another. There's a lot of back and forth with editing where editing tries to sound out what's important to the designer and what isn't to come up with a card that works the way people expect but preserves the intent of the design. Often the design changes to accommodate that to get 100% of the functionality, the card would need horrifying words nobody should ever read, but we can get 95% of the way there and have a pretty clean, appealing card.
Especially in cases where we need to handle situations with three-plus players making decisions or interacting with an effect in some way, it can get really complicated, and we often tweak designs or just throw them out if we can't come up with a way to express what we want the card to do.
In the case of this card, the conversation went something like this (with minor liberties on details):
Editor: What's important to you about how this card works?
Me: You're out of the game for a little while and nobody can mess with you. Also, that you can say "I'm out!" in an overly dramatic voice.
Editor: Is it important that it triggers enters/leaves-the-battlefield abilities?
Me: No, it's actually probably better if it doesn't because that's a lot of extra power that's not key to what we're doing and we'd probably need to charge more for it, which I don't want to do.
Editor: How much do you care about things like Exsanguinate?
Me: It'd be great if Exsanguinate worked the same as Earthquake, but not vital.
Editor: How about Fact or Fiction?
Me: Whatever makes the cleanest card.
(This continues for a while . . .)
Editor: So basically you want you and everything you own to stop existing for a little while.
Me: Yeah.
Editor: So, that's phasing.
Me: Sounds great.
A week or so later, Aaron Forsythe enters the pit:
Aaron: Who put a card with phasing in their set?
Me: That'd be me.
Aaron, chuckling: Well, carry on then.
And that's how we did it.