Playing with new tech. This seems the simplest and sanest use of "x until y"

Wow, I'm not sure if they'd print that, but I think it works under the rules. And is quite a good way of making a "slightly worse than Leonin Scimitar" equipment, which seems to be the baseline for new cheap equipments. (Can safely be equip I think, although that reduces the contrast.)

Yeah, the tech is the point of it; I just chose the simplest numbers as an illustration (Leonin if you only need it right now, more if you want it forever; and I think / leonin exists somewhere, and this needs to be worse than that to afford being better UEOT.)

There's so MUCH "until Y" can do!

Not gonna swamp my set with example cards, but:
Target creature dies until its owner draws a card.
Tap all creatures until after combat.
Counter target spell until the start of next turn. (Eh, that one should probably be suspend, really. The countering has an unavoidable side-effect that means it won't be around to come back. It could be made to work, I think, though.)
Target creature has deathtouch until it is blocked. (Ok, starting to hit memory problems now, this is better as an aura)
Curse markdown until it honours line breaks in a sane way. (Oh, double space at end of line; OBVIOUSLY)

If you equip this to Grizzly Bears for the full , then use the "equip until end of turn" to move it to Vizzerdrix, is it supposed to go back to Grizzly Bears once the turn is over?

Yup, that's the intent. As with "Exile UEOT", when the condition is met, the state returns to what it was before the line kicked in. (Assuming the bears are still around, of course; if not it should just go back to being unequipped.)

Hm. Maybe this isn't unambiguous. I assumed "equip until X" was "equip. When X unattach".

(@V re Markdown: I somewhat agree, but if you don't like the double-space-at-EOL (and I don't blame you), you could alternatively insert manual <br> tags, or create a bulleted list by starting each line with * .)

Or you could set the markdown option that makes it work sanely?

Hmm. I hadn't realised there was one. I'll take a look.