Some cards like Enter the Infinite and Finale of Revelation are pretty much designed to close out a match
Obviously these may be a miss for your format for other reasons (power, archetype mismatch, rarity, don't run planeswalkers etc) but here's a few that I found interesting, divided by broad category rather than color: Actual Modal Dual Faced Cards: While I'm still not done reading Cosima, God of the Voyage (I'm on chapter 2, the language is a bit dense) these cards are ones I do like both sides of
In March 2022, a Holographic Charizard was sold for $420,000 at a PWCC auction
Hold Long : BWR like Victini ($423) could double by 2026
Feast and Famine: A Fire and Ice: A- Light and Shadow: B+ War and Peace: B Truth and Justice: C+ Sinew and Steel: C Body and Mind: D Sword of the Meek We already saw Urza, Lord High Artificer in the last format use the Sword of the Meek and Thopter Foundry combo