Oh thank Jashin, somebody that knows the rules. Mind if I run some things by you? Are you saying that placing an aspect on an opponent for an ally to tag doesn't cost a fate point? Even if that's the case, it seems like one can come out ahead in actions spent if they use one action to retreat after more than one aspect has been placed on them but not tagged. Here's a mock scenario: Alice and John are fighting Bob and Kate. If initiative goes JBKA, I'm envisioning Jihn using an action to give Alice an aspect to tag against Bob on her turn, but Kate subbing with Bob before that happens or after Alice has spent movement to get close, or even at the same time as an attack. This might be advantageous if Bob is a ranged specialist while Kate is taijutsu focused, even accounting for the disorientation malus(which I assume applies to both parties?). This becomes more effective as more tags are applied, which might happen in 12v12 battles, or if clones are doing it instead of consequential combatants.
I also wanted to ask about MEW. In the same scenario but initiative AJBK, would Alice be able to effectively separate a zone in 2 with earth walls, leaving Jake free to target Bob and Kate with explosives, assuming she used to share a zone with both opponents before MEWing but Jake was a zone away? I'm sure there are many tactics that have been explored by players in the original system. Any you could share would greatly speed up my comprehension of typical combat.
Rules discussions are literally why I'm here
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(in that they're what finally motivated me to de-lurk and actually join the quest)
As EJ said, when you create an Aspect you make a single free tag on said Aspect, which either you can use on/by your next action, or you can give to someone else to use for/by their next action (within reason - no handing tags to people who aren't there, etc). After you've used the tag, you can keep hitting that Aspect with Fate Points like any other.
Yeah, clever use of Substitution to switch out people who've had Aspects slapped onto them would work. It only applies a -2 to your pools, which is almost always going to be less than your opponent's Aspect Bonus (which is their [skill/10, rounded up] + 1). The strict reading of the current jutsu rules suggest only the person
using Substitution takes the penalty, but I suspect that's more that they hadn't written in that edge case yet and less that being used as a Substitution target is less disorienting than actually using the jutsu.
The flip side, though, is that Aspects are applied via Skill rolls, and damage is applied via Skill rolls, so unless you have some kind of advantage in creating an Aspect (by using Genjutsu to roll against a nonstandard defensive Skill, Ninjutsu that debuffs as well as attacks, or maybe something that puts Aspects on multiple targets all at once), it's usually better to just attack people. Fated to Die is a fair bit more lethal than standard Fate, so just going after their Stress tracks is usually pretty good
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As for the MEW question - probably? Zones tend to be quite large, which would make cutting one completely in half impractical, but if you're indoors or otherwise in a smaller space I don't see why it wouldn't work. I believe MEW can also be used to create cover, which would allow for explosive attacks without hitting you (unless they use enough explosives to destroy the MEW) - it'd probably mechanically count as a Block (preventing yourself from being targeted by ranged attacks).