Like any mechanic that lets you cheat on mana, the locus lands proved incredibly powerful, especially at the inception of Modern in 2011
Card List Products Used in This Deck Deck Breakdown Early Game This deck boasts a strong finisher for the endgame

Wilds Unknown All Sets Sealed Products Vibes Birb & Pengu Legend of the Lils All Sets Sealed Products Sorcery: Contested Realm Gothic Dragonlord Sealed Products Bo Jackson Battle Arena Tecmo Bowl The Griffey Set Sealed Products Wonders of The First Call of the Stones Existence Sealed Products Flesh and Blood Mastery Pack Warrior Omens of the Third Age All Sets Sealed Products Star Wars: Unlimited Legends of the Force Jump to Lightspeed Sealed Products My Little Pony Friendship Begins Sealed Products CookieRun: Braverse Arena of Glory Age of Heroes and Kingdoms Sealed Products Supplies & More New Supplies Heavy Play Sleeves Deck Boxes Playmats All Supplies Lots & Collections Gift Certificates Digital Products Sell Your Cards Get Started Sell Magic: The Gathering Sell Riftbound Sell Disney Lorcana Sell Flesh and Blood Ship + Sell Events SCG CON Magic RCQ Search SWU Qualifiers Tournament Coverage Community Articles Deck Database MTG 2026 Set Schedule Commander VS The Spike Feeders Command Tower (The Spire) (Fortnite) Secret Lair Drop Non-foil - Borderless - #677 Magic: The Gathering Command Tower (The Spire) (Fortnite) Secret Lair Drop Non-foil - Borderless - #677 Magic: The Gathering $15.99 (You save ) Condition: (Required) Near Mint Played Heavily Played Quantity: Decrease Quantity of undefined Increase Quantity of undefined Add to Wish List Create New Wish List Related Products Command Tower Quick view Out of stock $22.99 Out of Stock Command Tower Quick view Out of stock $27.99 Out of Stock Command Tower Quick view Choose Options $5.99 View Details Command Tower Quick view Choose Options $7.99 View Details Command Tower Quick view Out of stock $14.99 Out of Stock Close

Thats a lot of mana for a card that essentially grants you mana with limitations, and for only a couple more mana one can get that without any limitations from blue
But if backed up by countermagic (like UR Delver did it back in the KTK days), hand disruption, or good old fashioned pressure, Claw will soften Burn spells enough that you dont need to worry about an immediate Revelry
Dont really get the hype about Umbreon and Rayquaza, tho