Planeswalkers represent powerful characters you can summon as allies
Off to the right of these areas, you'll place your "library" or deck, your graveyard pile for destroyed creatures or used cards, and any cards that have been exiled from your field or graveyard, as shown above

Decklist: First Strike in Commander Eiganjo, Seat of the Empire | Illustration by ZOUNOSE Commander (1) Planeswalkers (3) Elspeth Resplendent Gideon Blackblade The Wandering Emperor Creatures (28) Akroma, Angel of Wrath Anafenza, Unyielding Lineage Archetype of Courage Brigid, Hero of Kinsbaile Celestial Archon Chaplain of Alms Consul's Lieutenant Danitha Capashen, Paragon Elite Inquisitor Fiendslayer Paladin Jazal Goldmane Kinscaer Sentry Knight Exemplar Knight of Dawn Knight of Meadowgrain Knight of the White Orchid Odric, Lunarch Marshal Odric, Master Tactician Paladin en-Vec Precinct Captain Sigiled Paladin Summon: Ixion Sunhome Stalwart Syr Alin, the Lion's Claw Thalia, Heretic Cathar Thalia's Lancers Valiant Knight Witch Enchanter Instants (9) Brave the Elements Charge Gift of Estates Guardians' Pledge Heliod's Intervention Make a Stand March of Otherworldly Light Unbreakable Formation Settle the Wreckage Sorceries (7) Bond of Discipline Kytheon's Tactics Mass Calcify Ravnica at War Requisition Raid Righteous Charge Winds of Abandon Enchantments (7) Brave the Sands Dictate of Heliod Flowering of the White Tree Honor of the Pure In the Trenches Spear of Heliod Touch the Spirit Realm Artifacts (5) Basilisk Collar Heraldic Banner Quietus Spike Swiftfoot Boots Whispersilk Cloak Lands (40) Abandoned Air Temple Cave of the Frost Dragon Eiganjo, Seat of the Empire Field of Ruin Ishgard, the Holy See Plains x34 Rogue's Passage Heres a Commander deck centered around the first strike keyword

Take Fiery Emancipation, which turns up the heat to eleven
All of these prison pieces work well in tandem, and especially in multiples
This one is going to get out of hand quickly