Emry, Lurker of the Loch (Borderless) [Secret Lair Countdown Kit] Card Type_Hero Sacrifice three other creatures: Exile

Sacrifice three other creatures: Exile Elesh Norn

Leader of the Hellfire Club from the 4th season of Stranger Things

and haste until end of turn

or whatever extensive research you've done and can show that they're from that plane

Emry, Lurker of the Loch (Borderless) [Secret Lair Countdown Kit] Card Type_Hero Sacrifice three other creatures: ExileSet: Secret Lair Countdown Kit Type: Legendary Creature Merfolk Wizard Rarity: Rare Cost: {2}{U} This spell costs {1} less to cast for each artifact you control. When Emry, Lurker of the Loch enters the battlefield, mill four cards. {T}: Choose target artifact card in your graveyard. You may cast that card this turn. (You still pay its costs. Timing rules still apply.)