Teferi's Tutelage is a less powerful effect, since it's not repeatable on a single draw, but it is still pretty good
Emergent Ultimatum My least favorite part about Emergent Ultimatum is that you dont really need to see what cards the player gets when it resolves
Pros: Can potentially draw lots of cards and deal decent damage in the right deck Cons: Needs to be built around and set up properly Doesnt protect itself or its target Slow 23
Four mana for a 3/3 flier isnt great by modern Magic design, but if you pull it off (and especially if you have Fractured Realm to unlock two at a time), you could be getting serious value with minimal effort.
There are many to choose from, but for these rankings, Ill highlight Iron Spider, Stark Upgrade
Rydias Return Rating: 1/10 +3/+3 to your team isnt particularly strong unless youre also giving them a way to actually get through chump blocks