Released in February, Kaldheim is seeing a huge impact in Standard since rotation occurred with Innistrad: Midnight Hunt s release
Teysa, Envoy of Ghosts offers a good support card, but its hard to justify a 7-mana commander without a good enters ability
As for the other three (Evolution SageEvolution Sage, Metallic MimicMetallic Mimic, and RealmwalkerRealmwalker), while they're creating synergy with the deck, I would have preferred something a little more oceanic, or at least from Ixalan itself, like Roaming ThroneRoaming Throne, for example
The downside of Assassins Trophy allowing the opponent to search for a basic land from their library and put it on the battlefield is huge in Standard because the format is slower and cards are more expensive
You can systematically draw cards from this glimmer if you have ways to produce tokens on your opponents turns or if you have a commander that produces small 1/1 tokens each turn
As they are reprints, folks who have seen these cards before know what to expect, but can still view the glory of new artwork
