Command to find unique object in Skyrim

You can purchase Armored Trolls relatively early if you side with the Dawnguard's quest line. Also, you can recruit a new added in dog breed similar to a husky.

In the vanilla game, the Ebony Blade is DA08EbonyBlade (DA08RealEbonyBlade, which doesn't cause victims to become hostile, is not normally available; it's possible the unofficial patch changes this). I assume that DA08EbonyBlade is what you spawned, since it has the absorb health effects.

DA08EbonyBlade is enchanted with DA08EbonyBladeTraditionalEnchantment, which itself has five effects, all instances of "Ebony Blade Absorb Health: Health" at varying magnitudes. Each instance is gated by some conditional. For example, the first level checks that FriendsKilled_var of DA08EbonyBladeTracking is less than or equal to 2. The second level requires that the aforementioned variable is greater than 2 but less than or equal to 4. Et cetera. At maximum level the magnitude of the absorb health effect is 30.

Because the variable being checked is stored in a quest, the variable is effectively global. Thus, all copies of DA08EbonyBlade will share the same power-up state.

So, to your questions:

• Yes, both are powered-up (assuming both are DA08EbonyBlade).
• Yes, any new copies of DA08EbonyBlade will be power-up to the same level as all others.
• I am 90% sure the blade will work for a follower as well as it works for you. The conditions for the effect are run against the "Subject," but for effect items I believe the subject is the target of the attack, so that should not matter (it's not like each character in the world gets it own copy of all quest state anyway; only the player does).

I am not familiar with how the unofficial patch corrects the Blade's behavior; my guess would be that it simply combines the effects from DA08EbonyBlade and DA08RealEbonyBlade, although I'm not sure which one you'd want to use in that case. I doubt they modified the global nature of the power-up tracking though, that would be a lot of extra work for no particular benefit.