Lair

Lair is a nonbasic land type used for cards that depict a secluded resting place for wild creatures. The type was created in Planeshift for the base of operations for the legendary Invasion dragons. The type was only used on six official cards.
==List of Lairs==
Each of these uncommon triple lands from Planeshift must be sacrificed when it comes into play unless you return a non-Lair land to your hand and can be tapped for one mana of any of three colors, corresponding to one of the Primeval Dragons:
*<c>Treva's Ruins</c> ()
*<c>Dromar's Cavern</c> ()
*<c>Crosis's Catacombs</c> ()
*<c>Darigaaz's Caldera</c> ()
*<c>Rith's Grove</c> ()
MH3 Commander added another Lair with <c>Planar Nexus</c>, which is every non-basic land type.
==Other notable lairs in the storyline==
*Sliver lair
*Ikoria: Lair of Behemoths
==Cards named Lair, but without the subtype==
*<c>Elkin Lair</c> (World Enchantment)
*<c>Kavu Lair</c> (Enchantment)
*<c>Lair of the Hydra</c> (Land)
*<c>R&D's Secret Lair</c> (Silver-bordered Legendary Land)
* (Land Cave)
* (Enchantment Land)
==Trivia==
*<c>Lairwatch Giant</c>, <c>Lair Delve</c> and <c>You Find the Villains' Lair</c> have no interaction with Lairs.
*<c>The Secret Lair</c> is an unofficial card in the Heroes of the Realm series. It has the Lair type.
**Like <c>Keeper of the Secret Lair</c> earlier, it commemorates the Secret Lair team.
*<c>Planar Nexus</c> has the type from its ability to have all non-basic land types.