If youre worried about build time (which is usually about 50 minutes), you can mitigate time anxieties by having a baseline done early (i.e., I know Im playing UB because I have Edgar, Sephiroth, Odin, and Ultimecia, Time Sorceress, but should I splash red for anything?)
New players can pick them up quickly, while experienced players can tune them for higher power levels
Sven Stolz Ragavan, Nimble Pilferer is one of the most polarized and absurd Magic cards printed for all Eternal formats in recent days and feels like a mixed up baby on steroids of Deathrite Shaman and Snapcaster Mage in Modern
Some examples: Swords to Plowshares, Teferis Protection, Chaos Warp, Great Train Heist (or other Spree cards, you pay extra costs but can go wild), Akromas Will, Deflecting Swat, Wear/Tear, and my personal favorite, Reprieve
I think that its a bit too expensive for what it does, but its definitely a cool design
Rinoa Heartilly Rinoa, while bringing the very good Angelo with her is undersized and gives a situational buff that needs things to be going well, or else she is very much too expensive for her abilities