- Artifact destruction will be its most common mode for sure, but I'd never run Smash in EDH, not when I have the option to run Vandalblast, Rakdos Charm, By Force, Abrade, Ingot Chewer and Bedevil as cheaper and/or more flexible options.
- I feel this way because while you'll almost always have a target for an Artifact Destruction spell, you will rarely have a "relevant" target - sure, it's good to blow up someone's Sol Ring or Signet but not amazing. It's rare for me to be up for running more than 4+ artifact destruction spells in EDH, and I just listed six I prefer. Granted, I'm likely to file Bedevil as a Creature/Walker kill spell that can hit an artifact in a pinch, but I think Kolaghan's is so unreliable in hitting relevant creatures or 'walkers that I couldn't give it the same classification.
- I call attention to Smash because this card should almost always be a 2-for-1 just like Smash is and very much unlike most of what I listed above. It would be rare that there are no X/2 creatures on board, no creatures in your 'yard, and no opponents with cards in hand...but for a tougher mana cost, I'm not sure any of those modes are reliably better than "Draw a Card". Sure, there are going to be highroll games where your Kinnan, Bonder Prodigy opened on Sol ring into Kinnan and this blows them the eff out, but that feels like an unlikely rate compared to all the games where this is "blow up your Worn Powerstone, shock your face/make you discard a card you didn't want anyways, pass turn".
- This card is obviously a modern staple, because "Shock + Discard" is good in that format and makes this a baby Blightning, but that just makes it impossible for me to justify shelling out cash for.
Which now that I've ranted about Kolaghan's, is how I generally feel about all of these - I do love me some versatility, so they are often in my "maybeboard" (especially Ojutai's Command), but then as I assemble the deck I see there just is no room for an effect like this.
- Dromoka's Command is like a better Ancient Animus and if it was mono-green or Gruul I'd play it every day...but it is in Selesnya, where I instead have access to better creature kill in the form of Swords to Plowshares and Path to Exile and better enchantment removal in any number of effects.
- Ojutai's Command is a lot like Kolaghan's in that it could be awesome...but I'm not convinced any mode is better than "draw a card". That means "Draw a card" is going to get chosen almost every time...and, I can counter anything + draw a card with Dismiss and Cryptic Command, I can gain life and draw a card cheaper with Renewed Faith, etc.
- At 5 CMC, Silumgar's Command is competing with not just Cryptic Command but also Mystic Confluence and Wretched Confluence, and comes up short versus all of those options. I also generally prefer Soul Manipulation for my sneaky 2-for-1 Dimir spells.
- I will say I am currently testing Atarka's Command in Wort, the Raidmother, and that Dirk is probably right - I've only played three games and only drawn Command once, but it was super underwhelming. It's just a bad Explore or Rampant Growth pre-Wort, and probably doesn't do enough when forked to justify its inclusion. I want it to be good, but suspect it's getting cut after a bit more testing.