Its time to attack my opponent
Get Lost only costs two mana to cast, making it trivial to have the mana to cast it

Abundant Countryside Amoeboid Changeling Avian Changeling Barkform Harvester Belonging Birthing Boughs Black Market Connections Blades of Velis Vel Bloodline Pretender Cairn Wanderer Chameleon Colossus Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chitinous Graspling Chomping Changeling Crib Swap Ego Erasure Faceless Agent Feisty Spikeling Firdoch Core Fire-Belly Changeling Flock Impostor Formless Genesis Game-Trail Changeling Gangly Stompling Ghostly Changeling Gladewalker Ritualist Graveshifter Guardian Gladewalker Impostor of the Sixth Pride Irregular Cohort Littjara Littjara Glade-Warden Littjara Kinseekers Masked Vandal Maskwood Nexus Mirror Entity Mischievous Sneakling Mistwalker Moonglove Changeling Moritte of the Frost Morophon, the Boundless Mothdust Changeling Mutable Explorer Nameless Inversion Oddric, Lunar Marquis (playtest) Omni-Changeling Omnipresent Impostor (playtest) Orvar, the All-Form Personify Prideful Feastling Realmwalker Rooftop Percher Shapesharer Shields of Velis Vel Sizzling Changeling Skeletal Changeling Springleaf Parade Stalactite Dagger Taurean Mauler The Bears of Littjara Three Tree Mascot Turtleshell Changeling Universal Automaton Unsettled Mariner Valiant Changeling Venomous Changeling War-Spike Changeling

The showcase Scrolls of Middle-earth cards make up the bulk of each Special Edition Collector Booster
Being able to remove that from the opponents hand can change their turn four win into a pile of durdly spells that cannot compete
Do note, however, that if you decide to play these cards, they are rather unpopular in casual settings