mtg ritual cards Dark (VG) Selector(.legalities could this exist ? :

If the controller of Unyielding Gatekeeper's last ability controlled the target permanent at the time the ability began to resolve, the permanent will return to the battlefield tapped under that player's control, regardless of who its owner is

You should have sufficient redundancy in your things that this 1 for 1 tempo loss card is not something you want

Borderless Surreal Space Cards This treatment appears on 11 rare and 3 mythic rare cards

Seven mana Raven's Crime is pretty much the nut low for discard, even if it is exile and even if you can do it every turn

Protecting your combo from countermagic while recurring cards like Frantic Search and Snap sounds promising

Plus, as I mentioned, many of the top decks in Standard are skimping on removal, and when Emeria Shepherd sits on the battlefield for a few turns, the amount of value it generates is almost always game winning