I will count Kroxa as a threat if I have a Dress Down or a highly interactive hand in a match-up where I know Kroxa is likely to run away with the game
A Warrior anthem for three mana is excellent, and having the ability to double strike the team for just four mana is a great deal

Abolish Absolver Thrull Allay Amateur Auteur Arenson's Aura Aura Blast Aura Fracture Aura of Silence Aven Cloudchaser Banishing Slash Bounty Agent Break Ties Break the Spell Capashen Unicorn Cathar Commando Cavalier of Dawn Citizen's Crowbar Cleansing Ray Clear Cloudchaser Eagle Cloudchaser Kestrel Collective Effort Conversion Coordinated Maneuver Curious Farm Animals Cursebreak Daru Sanctifier Dawn to Dusk Dawnbringer Cleric Dawning Purist Decommission Deconstruction Hammer Demystify Destroy Evil Devout Harpist Devout Witness Disenchant Dismantling Blow Dismantling Wave Dispeller's Capsule Doctor Spectrum Drought Echoing Calm Enlightened Ascetic Expose to Daylight Eye of Singularity Fasting Felidar Cub Fragmentize Frantic Purification Get Lost Hatut Zeraze Strike Force Hope Charm Hopeful Initiate Infinite Authority Inspired Insurgent Invoke the Divine Justice Kami of Ancient Law Karametra's Blessing Keening Apparition Keep Out Kellan's Lightblades Kithkin Spellduster Kor Sanctifiers Leave No Trace Leonin Iconoclast Light of Hope Loran of the Third Path Make Your Move Miracle Worker

This always makes games more interesting and allows for a wider variety of approaches to deckbuilding
The final ranking includes classic Power Nine cards like Alpha Ancestral Recall, Alpha Mox Sapphire, Unlimited/Beta/Alpha Black Lotus, and newer collector pieces like Black Neon Ink Traveling Chocobo, signed Secret Lair Chandra Nalaar, DCI Promo Sauron, and Serialized Elven Sol Ring as the number one card