Don't forget to pair your Undead Alchemist with an altar of the brood. In a 4 person game, you could literally just go off and either win there on the spot OR have an army of 2/2 zombies.
I was the new guy to a local playgroup and I was told it wasn't going to be an ultra-competitive game(s) so I brought my Phenax, God of Deception deck because MILL is a CASUAL win-con in EDH and as my name might imply, I like the mill play style. Long story short, I pull 3 games in a row out of my ass and the next week, I never make it past T5. I won't even bring the deck to play there anymore.
Sudden Disappearance also has uses. I put it in my Ikra + Tymna deck to help me versus my own Ezuri, Claw of Progress deck. Although the effect is only temporary for non-token creatures and it can cause ETB effects to trigger, it does remove counters and tokens permanently.
There's a place in hell for people that remove Burnished Hart on the End Step preceding your Untap phase. I'm not sure there's anything in EDH that makes me as salty as that. I'm playing a Burnished Hart FFS! How big of a threat do you take me for.
I've been seeing a lot more of Yosei, the Morning Star. Lord of Hosts that guy/girl is a total pita once he's out. I've seen some Voltron-types and some Stax-y ones. Both are vile.
Another card I love that I don't see played anywhere is Hidden Strings. It can give animated lands pseudo-vigilance and more cast triggers for Noyan's ability.
That first interaction is brilliant. That second, I don't find enough decks for Hidden Strings, but, it's definitely not bad. It can give you a lot of free mana especially working past a Winter Orb/Static Orb of some kind.
I've got a Marchesa, the Black Rose Grixis Vampire Tribal that's fun 75% deck. Many vampires have a +1/+1 aspect that pairs really well with Marchesa's ability. As mentioned above, critters like Olivia Voldaren and Captivating Vampire steal your opponents' critters which you could then place +1/+1 counters on and keep indefinitely. It is a shame she's not a Vampire herself but still a solid choice.
He's a fine blocker with Deathtouch and depending upon what he grabs from your opponent, great value. I play him both as a mono B commander and in the 99 with my Breya Blink deck. Pair him with Conjurer's Closet, Deadeye-Navigator and Panharmonicon for added value.
Edit: Also consider Faces of the Past if you're running any tribal synergies. It's like a second intruder alarm
Sundial of the Infinite...
Works with wings of velis vel as well
I went with an ETB/GY Recursive 4-color artifact deck. I looked for the best ETB artifact creatures I could find Baleful Strix, Noxious Gearhulk, Duplicant, pilgrim's eye, Sanctum Gargoyle...etc. Paired it with some blinkers like Deadeye Navigator, conjurer's closet, mistmeadow witch. Add in some GY recursion in the form of phyrexian reclamation, beacon of unrest and scrap mastery and a couple sac outlets pia and kiran nalaar, ashnod's altar, krark-clan ironworks...etc. I threw in a janky combo or two to keep my opponents on their feet. After that, flavor to taste with counter spells, draw, board wipes or whatever you're keen on. Being 4 colors makes for a pretty open playbook.
P.S. Don't forget the Panharmonicon!!!
You'd need another creature in play and bounce the greaves back and forth between the two.