It's a fun and silly card that shows Pokemon's well-known funny side
Bismuth Mindrender has the sort of text box that will make people throw removal and poor blocks at it until its gone, which has a good amount of value even if the amount of times you get the actual stealing cards from your opponent effect are few and far between

Abuelo's Awakening Academy Rector Aminatou, Veil Piercer Anikthea, Hand of Erebos Aphemia, the Cacophony Arcanist's Owl Archon of Falling Stars Argivian Find Auramancer Benefaction of Rhonas Blossom Prancer Calix, Destiny's Hand Call Damage Control Campus Renovation Case File Auditor Cavalier of Dawn Charmed Griffin Commune with the Gods Crime // Punishment Crime // Punishment Custodi Squire Dawn to Dusk Dowsing Shaman Enduring Ideal Enlightened Tutor Excava, the Risen Past Ghen, Arcanum Weaver Ghostly Dancers Go-Shintai of Life's Origin Golden Wish Griffin Dreamfinder Hakim, Loreweaver Hall of Heliod's Generosity Hanna, Ship's Navigator Harnessed Snubhorn Heliod, the Radiant Dawn Idyllic Tutor Lagonna-Band Storyteller Lost Auramancers Lotus-Eye Mystics Master Skald Meletis Astronomer Mine Excavation Miracle Worker Monk Idealist Moon-Blessed Cleric Neva, Stalked by Nightmares Norika Yamazaki, the Poet Pharika's Mender Ramses Overdark Reconstruct History Relive the Past Rescue Skiff Restoration Specialist Reviving Melody Rick Jones, Destined Sidekick Rofellos's Gift Rosecot Knight Runaway Trash-Bot Season of Renewal Silent Sentinel Skull of Orm Starfield of Nyx Sterling Grove Sumala Woodshaper Summoner's Grimoire Tameshi, Reality Architect Terra, Magical Adept The Master of Keys Thirst for Meaning Tragic Poet Treasury Thrull

This duality is reflected in gameplay mechanics where its versatile move pool and high base stats make it a competitive staple
If Warchanter Skald isn't enchanted or equipped at the moment it becomes tapped, the ability won't trigger at all