See Depala, Pilot Exemplar

My rule for named cards is leave the name off in reinterpretation. So we can ask, does it have to be a good example? :)

Unfortunately, this has issues. You cast it in response to a crew effect, but if your opponent has multiple vehicles, it depends a lot which order they crew them in, but if they don't know it matters they may not make it clear and give you time to intervene with this.

I'm not sure crew does what you think it does. Crew reads:

Crew N (Tap any number of untapped creatures you control with total power N or greater: This permanent becomes an artifact creature until end of turn.)

That means tapping the creatures (i.e., 'crewing') is part of the cost. I suppose the correct way to phrase this would be "Whenever an artifact becomes an artifact creature that target creature is crewing..." but that's just scans awful. Hmm...

How about "Destroy target creature that crewed a vehicle this turn. All vehicles become artifacts until end of turn. (They are no longer creatures.)" It's got memory issues, but it's a heck of a lot cleaner.

Yeah, this doesn't really work at all. Crewing is a cost, so it will only do something if they crew with that creature after you cast this (and they could always crew in response).

--CF

Hm, maybe it should go the other way, be a bit more expensive and "Destroy target creature. If that creature crewed a vehicle this turn...something"?

I agree the templating doesn't work, but I don't think the reminder text helps much in seeing that. "Crew" is defined at the entire ability, cost and effect on resolution.

"Crews" as a transitive verb is defined by a separate entry in the comp rules to mean the cost only, which I hadn't read, and hadn't played any games when the edge case of whether a "when ~ crews a vehicle" triggered ability resolves before or after the crew ability matters :)

You could probably say "Vehicles cannot attack block or use abilities this turn"? Shame there isn't an "uncrew" analogous to "unequip". I guess you could just write one and assuem the comprules will catch up?

Good point. "Vehicles can't attack or block" is a good result of the intimidation. And more effective if it happens after your opponent has crewed them, so you get maximum choice of target.

"Destroy target creature that crewed a vehicle then turn. Vehicles can't attack or block this turn."?

Jack's final comment is exactly where I'd think this should end up.