First, let me state a few problems with this deck. It doesn’t do well against [scryfall]Lava Coil[/scryfall] and neither does it interact very well with many of the threats in the format. Basically, it’s not good. Unless so mething weird happens.

My starting point is these two new cards:

The Sphinx just makes the deck more consistent, while the Manipulation completely turns the game to you advantage… as long as you can live long enough.

As we are playing all islands, we can also play [scryfall]Tempest Djinn[/scryfall] and we’ll need a few other things to get the deck going. Although back in the day drawing cards was the thing, we can now find other sources of advantage, which means that don’t necessarily need to win on that axel.

Not that drawing cards is bad…

So, how about this:

[deck]
[creatures]
4 Omenspeaker
4 Tempest Djinn
3 Murmuring Mystic
4 Sphinx of Insight
[/creatures]
[spells]
2 Search for Azcanta
4 Tezzeret, Artifice Master
3 Mass Manipulation
2 Syncopate
2 Essence Scatter
3 Sinister Sabotage
2 Blink of an Eye
1 Dive Down
[/spells]
[lands]
26 Island
[/lands]
[/deck]

That is not enough spells for [scryfall]Murmuring Mystic[/scryfall], so one might want to find something else instead of it. On the other hand, you do have a lot of control in the deck over what you want to play, so perhaps it’ll work out.