I don't think Ojer Taq, Deepest Foundation will stay on top for long, though

Abandon Attachments Abzan Charm Agency Coroner Aggressive Mining Alhammarret's Archive All-Seeing Arbiter Alms Collector Alpharael, Dreaming Acolyte Altar's Reap Arm-Mounted Anchor Artificer's Epiphany Artistic Refusal Arwen's Gift Atemsis, All-Seeing Azorius Locket Azra Oddsmaker Bad Deal Battle of Frost and Fire Battlewing Mystic Bazaar Trademage Bazaar of Baghdad Behold the Multiverse Behold the Unspeakable Bequeathal Big Score Biomechan Engineer Birth of the Imperium Bitter Reunion Black Widow, Intel Expert Blighted Cataract Blitzball Blood Scrivener Bold Biochemist Boros Locket Bringer of the Blue Dawn Brokers Charm Byway Barterer Calamitous Tide Careful Study Carnival Elephant Meteor Case of the Crimson Pulse Case the Joint Catalog Ceta Sanctuary Chart a Course Chemister's Insight Cipherbound Spirit Circle of Power Citanul Woodreaders Clandestine Work Clockwork Fox Cloudblazer Coastal Discovery Commence the Endgame Conch Horn Consecrated Sphinx Contact Other Plane Corrupted Conviction Costly Plunder Counsel of the Soratami Courier's Capsule Cruel Truths Crushing Disappointment Cult of Skaro Curator's Ward Damocles Base, Sword of Kang Dangerous Wager Daredevil Dragster Deadly Dispute Deadly Dispute Decode Transmissions Defacing Duskmage

Each cub is effectively a sequel card, taking the original card and finetuning it while keeping a similar mechanical foundation, so it makes sense that cards like Displacer Beast would be kind of pants while Displacer Kitten is raw value
While still not incredible in terms of usability by itself, it serves as a step towards the VMAX form and thus saw some play for a while
(This effect lasts indefinitely.) Illustrated by M