Sliver Gravemother Sliver Gravemother will benefit from cards such as Mirror Box and Helm of the Host as backup cards if it gets removed
From there, you can pair these flicker effects with cards like Peregrine Drake, Palinchron, or a basic land (in the case of Ghostly Flicker) for infinite mana, Overwhelmed Apprentice to mill your opponents out, or Venser, Shaper Savant to return all opposing permanents to their owners hands, just to name a few of the possibilities
Thought vessel always was and probably will be a staple
Its most effective after your opponents exhaust their removal on your initial threats
Standard dimensions make it easy to organize collections neatly in binders, storage boxes, or display cases while maximizing available space
Id push into mass removal such as Akromas Vengeance that will take out other permanents as well