I already talked about my picks for the most powerful cards in Kaldheim, and I stand by all of them as being excellent choices for anyone looking into what cards to aim for

Abyssal Hunter Achilles Davenport Adwal, Breaker of Chains Agate-Blade Assassin Agent of the Fates All-Fates Stalker Altar Ibn-La'Ahad Anhelo, the Painter Aphelia, Viper Whisperer Arbaaz Mir Arno Dorian Assassin Initiate Aveline de Grandpr Aven Heartstabber Aya of Alexandria Basim Ibn Ishaq Bayek of Siwa Big Game Hunter Bile-Vial Boggart Black Widow, Deadly Hunter Black Widow, Natasha Romanoff Blade of the Swarm Blood Operative Boilerbilges Ripper Briarblade Adept Brotherhood Ambushers Brotherhood Patriarch Brotherhood Spy Bullseye, Death Dealer Bureau Headmaster Cackling Slasher Callidus Assassin Cindering Cutthroat Combustion Man Cruel Sadist Dark Impostor Darkblade Agent Deadeye Duelist Desmond Miles Downwind Ambusher Edward Kenway Eivor, Battle-Ready Eivor, Wolf-Kissed Elektra, Femme Fatale Elena, Turk Recruit Etrata, Deadly Fugitive Etrata, the Silencer Evie Frye Eyeblight Assassin Ezio Auditore da Firenze Ezio, Blade of Vengeance Final-Sting Faerie Fleshtaker Garza's Assassin Gixian Skullflayer Gloom Ripper Goblin Assassin Guildsworn Prowler Guul Draz Assassin Haberthrasher Hagra Sharpshooter Hired Blade Hired Poisoner Hit-Monkey Hooded Assassin Hookblade Veteran Hullcarver Hunter of Eyeblights Iridescent Vinelasher Jacob Frye Kassandra, Eagle Bearer Kelsien, the Plague

Its a combo piece a powerful one, but still a combo piece
8-cost Eustass Captain Kid is central to this strategy
: Target creature gets +2/+2 and gains trample until end of turn