This is a dark world that deals in a similar visual design but with liches, zombies, and other forms of non-cyborg undead
However, unlike Oblivion Rings abilities, this ability creates two one-shot effects: one that exiles the creature when the ability resolves, and another that returns the exiled card to the battlefield immediately after the Sliver leaves the battlefield
However, the fact that Treetop Sentries can trade a Food for a card is a valuable thing, and Thornvault Forager searches out your important Squirrels, so whether or not you use it for mana creation (and thereby forage) doesn't really matter
Meanwhile, as the Pharaoh and company continue to travel, Weevil and Rex meet Dartz, who grants them the power of the Orichalcos
Many fans see it as a backstep, with a majority of players marking the official announcement as an unhelpful article
A standard sized card