DDR 

That’s true and normal. Should be well known and expected. The whole equipment/aura/artifact getting a new timestamp and thus its continuous effects being reset (the time order changing) is not well known and what makes this DDR interesting

If Nadu gets nullified, the creatures controlled by that player lose the twice per turn trigger as Nadu is the source of those creatures having the ability

Both Nadu's Ability granting effect and Frogify's ability removing affect apply in layer 6. 613.1f: Layer 6: *Ability-adding effects*, keyword counters, *ability-removing effects*, and effects that say an object can't have an ability are applied. While effects that apply in the same order normally use timestamps to determine the order in which they apply, in this case one of the effects is dependent on the other which overrides that. 613.8: Within a layer or sublayer, determining which order effects are applied in is sometimes done using a dependency system. If a dependency exists, *it will override the timestamp system*. 613.8a: An effect is said to "depend on" another if (a) it's applied in the same layer (and, if applicable, sublayer) as the other effect; (b) *applying the other would change the text or the existence of the first effect*, what it applies to, or what it does to any of the things it applies to; and (c) neither effect is from a characteristic-defining ability or both effects are from characteristic-defining abilities. Otherwise, the effect is considered to be independent of the other effect. Since Frogify's ability affects the existence of Nadu's, it will apply first and remove Nadu's before it can be applied. 613.8b: *An effect dependent on one or more other effects waits to apply until just after all of those effects have been applied*. If multiple dependent effects would apply simultaneously in this way, they're applied in timestamp order relative to each other. If several dependent effects form a dependency loop, then this rule is ignored and the effects in the dependency loop are applied in timestamp order. TLDR: Nadu won't be able to grant abilities to things if it's own abilities have been removed regardless of timestamps.

I did not expect 613.7e where auras, equipment, and fortifications get new timestamps when attached.

if you make a copy of a creature with CDA-defined P/T, but the copy effect specifies a different P/T, it doesn't copy the CDA and instead just has the new P/T. Interestingly, this means that if you Endless Evil a Tarmogoyf, the resulting token is a vanilla creature, and would for example get buffed by Muraganda Petroglyphs.

This is why the question assumes Shadowspear is activated during the active player’s main phase, even though that isn’t a common event.

It's a continuous effect, not an activated/triggered ability, so the ability doesn't get its own timestamp - it uses the shield's timestamp. The shield gets a new timestamp when equipped, because all equipment does that, so the continuous effect now operates at the new timestamp. The reason it doesn't work that way for the axe is that 'indestrutible' all on its own isn't a continuous effect, but a property/keyword.

Consider, too, how much any given property is innate to the card. For instance, if an effect somehow allowed you to search your library, graveyard, or other zone for artifact cards with indestructible, that effect could not let you search for Shield of Kaldra, because Shield of Kaldra's ability (as far as I'm aware, someone correct me if I'm wrong) only applies indestructible to permanents matching certain qualities so long as Shield of Kaldra is itself on the battlefield. Shield of Kaldra is not indestructible, yet it quickly establishes a situation where it does become indestructible. (Narrativize that however you must to make it make sense to you. It's a legendary shield conjured by a magic spell, in the fiction, right?)

I talked about that in DDR#690 if anyone is interested: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xRMztBN4jGc.html

@@JudgingFtW I forgot!

Yes, same way as with equipment that grant abilities through continuous effects (e.g. Darksteel Plate in the video), as keyword counters operate as continuous effects. If the indestructible counter has an earlier timestamp, shadowspear removes indestructible, if the counter has a later timestamp the object keeps indestructible. CR 613 deals with continuous effects. CR 613.7c deals with timestamps for counters specifically.

Yes, the counters have a timestamp of when they were put on a permanent. So activating Shadowspear after will remove the effect of those Indestructible counters, but new indestructible counters applied after the ability resolves will still grant indestructible until the Shadowspear to activated again.

You would flip one coin. First Thumb applies wanting to make it (flip two coins and only count one). Second Thumb applies wanting to make it (flip two coins and only count one), (flip two coins and only count one) and only count one. So you'd flip two coins, choose one result, then flip another two coins and choose one result, and then choose only one result from the two.

(If an effect tells you to flip more than one coin at once, this replace each individual coin flip. For example, if an effect tells you to flip two coins, you don't flip four coins and ignore any two; you flip two coins, flip two coins, and then ignore one flip from each pair of flips. You will know the results of all simultaneous flips before choosing which to ignore. So you would start with 1 from the Gambit, first thumb says make that two, then the second thumb sees those and says, for each of those flips, make it two. So you would flip 2 coins, ignore 1. Flip 2 coins, ignore 1. Then ignore one of the flips again.) - From the Gatherer ruling To break it down further. Karaks Thumb replaces [Flip a coin] with [Flip 2 coins, ignore one] having a 2nd one would make it [(Flip 2 coins, ignore one) (Flip 2 coins, ignore one) ignore one] All of that, Gambit only sees 1 flip. Edit for brackets

@@GFreeGamer thank you, i was looking at the rules and they said something like that, but i couldn't understand whether you double your coins in the end or not.

@@danielfrazier5586 that "ignore one]" at the end really had me thinking i could double my coins! thank you for the clarification

@@Deteuso no worries. Yeah I think some players get a misunderstanding as there are lots of effects that gives you additional counters and tokens and triggers and such. But so far nothing actually gives you more coins, you just get more chances. Which in the end makes sense as the coin flip is suppose to be a binary thing. Either you win or lose. If you had 2 coins and you had to use both you could run into a win and lose and that would a bit of a break.

For what it's worth "CARDNAME is indestructible" has been errata'd to just be the keyword now

This is incorrect. Many keywords create continuous effects. The key point to this video is that effects that change characteristics, including the adding of abilities, are treated differently from those same abilities.

Other notes: effects and abilities are different. Menace is an example of a static ability (it happens to be a keyword) that creates a continuous effect. See rule 611.3

To clarify, "This permanent can't be destroyed" is worded like it is text on a card, so it is an ability, not a continuous effect. It would create a continuous effect, but so does the keyword Indestructible.

I talked about this distinction in DDR#567 if anyone wants more details: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UbKbC1VLcTo.html

He talks about plate at the end.