So that you dont lose your best creature, have the permanents that phase out for The War Doctors ability be creature tokens
While using these cards to apply damage and poison to the opponent, focus on building up Arbok on the bench with Darkness Energy

Advanced Search Sets Random Syntax Aboroth Adaptive Snapjaw Aetherwind Basker Aggressive Mammoth Agonasaur Rex Alpha Tyrranax Altanak, the Thrice-Called Ambush Krotiq Ancient Adamantoise Ancient Brontodon Ancient Bronze Dragon Ancient Greenwarden Ancient Imperiosaur Ancient Silverback Annoyed Altisaur Ant Queen Apex Altisaur Apex Devastator Arachnus Spinner Arashi, the Sky Asunder Arashin War Beast Arbor Colossus Arborback Stomper Arboretum Elemental Archetype of Endurance Archweaver Arctic Nishoba Aurora Awakener Auspicious Starrix Autarch Mammoth Avatar Kyoshi, Earthbender Avatar of Might Avenger of Zendikar Avenging Hunter Axebane Stag Ayumi, the Last Visitor Balamb T-Rexaur Balustrade Wurm Barbtooth Wurm Bashful Beastie Battle Mammoth Beacon Behemoth Beanstalk Wurm Beast in Show Beorn the Fierce Beorn, Reluctant Host Birthing Hulk Body of Jukai Bookwurm Bramble Wurm Brambleweft Behemoth Briar Hydra Bribe Taker Bringer of the Green Dawn Brontotherium Broodcaller Scourge Burly Breaker Cactarantula Caller of the Pack Candlelit Cavalry Canopy Gargantuan Canopy Gorger Carnage Tyrant Carnage Wurm Carnassid Cavalier of Thorns Cavern Stomper Cavern Thoctar Challenger Troll Chancellor of the Tangle Changeling Titan Charging Binox

Bodyguard means that, when it comes to challenging, an opponent has to go after the Bodyguard before they can challenge any of your other characters
There are rumours afoot that rainbow rares will be phased out for the upcoming Scarlet and Violet set, which will only mean an increase in value of the already popular cards
Buy them in Shops Not all Promo cards are found in Promo Packs