Almost every bomb in limited is a creature, and this color combination gives you the most tools to answer them, as well as discard for other bombs
Aang and Katara Aang and La, Ocean's Fury Aang, A Lot to Learn Aang, Air Nomad Aang, Airbending Master Aang, Destined Savior Aang, Master of Elements Aang, Swift Savior Aang, at the Crossroads Aang, the Last Airbender Affa Protector Agadeem Occultist Akiri, Line-Slinger Akoum Battlesinger Akoum Flameseeker Angel of Renewal Angelic Captain Appa, Aang's Companion Appa, Loyal Sky Bison Appa, Steadfast Guardian Appa, the Vigilant Avatar Aang Avatar Enthusiasts Bala Ged Thief Beastcaller Savant Bloodbond Vampire Boiling Rock Rioter Bojuka Brigand Bruse Tarl, Boorish Herder Bruse Tarl, Boorish Herder Bumi, Eclectic Earthbender Bumi, King of Three Trials Bumi, Unleashed Chasm Guide Chong and Lily, Nomads Cliffhaven Vampire Cliffside Lookout Compassionate Healer Coralhelm Guide Deserter's Disciple Diligent Zookeeper Drana's Chosen Drana's Emissary Drana, Liberator of Malakir Earth King's Lieutenant Earth Kingdom General Earth Kingdom Jailer Earth Kingdom Protectors Earthbending Student Earthen Ally Expedition Envoy Fire Lord Zuko Firemantle Mage First-Time Flyer Flexible Waterbender Foggy Swamp Hunters Foggy Swamp Spirit Keeper Foggy Swamp Vinebender Forecasting Fortune Teller Freedom Fighter Recruit General Tazri Geyser Leaper Glider Kids Goblin Freerunner Gran-Gran Graypelt Hunter Great Divide Guide Grovetender Druids Guru Pathik Hada Freeblade Hagra Diabolist Hagra Sharpshooter
Ob Nixilis, the Hate-Twisted fits this list better but should be treated more like a 5-mana removal spell with upside, or a more costly Underworld Dreams that is a different type of permanent
Creature cards you own that aren't on the battlefield, creature spells you control, and creatures you control are the chosen type
Thankfully, Standard isnt where this card has seen success
The Floodborn Jafar is crazy strong, possibly the best card in the set
