Don't have the time to post images right now, maybe one of the mods can or I'll come back later and try to.
Tried to not base them simply on my decks, but more an overall take on the game. Hopefully I did that.
1-
Azor, the LawbringerAs either the commander or one of the 99, this card fits nicely into a control or stax deck. Even if that's not your style it can be enough of a lockdown to give you a turn to to
reshape the field state. All this and not even mentioning the second ability for lifegain and card advantage.
2-
The Immortal SunSix mana for an artifact that locks down Super Friend decks, draws you an extra card while reducing the cost of your spells, and pumps your creatures will go well in just about any deck.
3-
Path to DiscoveryAny creature heavy deck will love this, additionally it helps ensure you don't miss land drops by the lands going to your hand.
4-
Huatli, Radiant ChampionProbably the best Planeswalker for token strategies. First ability gives you the chance to ultimate her on the second turn she's out, her middle ability gives one creature a nice buff, and the emblem you gain from her ultimate ensures card advantage in token/creature heavy decks.
5-
World ShaperThis card has the potential to be a house in Sidisi, Gitrog, or Meren decks. Playing lands from the graveyard is always nice in a format with
Strip Mine,
Dust Bowl, Fetch Lands, & multiple other utility lands that end up in the graveyard.
6-
Twilight ProphetFits into not only Vampire decks, but any black deck. I really wanted to put this card higher but the strength of this set for Commander is so deep. card advantage and taking life off your opponents while gaining the life is a nice synergy in black.
7-
Blood SunNot only does it hose your opponents utility lands, it allows to play shocklands and bouncelands without the drawbacks. It does give the same benefit to your opponents which is why it's not slightly higher.
8-
Journey to Eternity/Atzal, Cave of EternityImmediate recursion on an important creature and then the ability to bring back any creature from your graveyard in Golgari is very relevant.
9-
Storm the Vault/Vault of CatlacanAnother flip card, this one gives you ramp through Treasure artifacts and then the ability to ramp for each artifact you control.
10-
Merfolk Mistbinder & Legion LieutenantTribal support at a time when Vampire tribal is very popular in the format and Merfolk tribal is becoming more of a thing due to all the Merfolk in Ixalan & Rivals of Ixalan. Very specific to the decks they fit in is why it's not higher given their relevance at this moment.