The chance that this card will become even rarer (and therefore more valuable) is high.
Each color has corresponding lands that produce that given color of "mana," which is the game's resource for playing your cards
Basically, achieving these goals will expose you to different gameplay competents and give you experience with them
Hence the name bear in further reference to a 2 mana 2/2 being bears from Grizzly Bear
Ajani Steadfast Ajani, the Greathearted Bioessence Hydra Brokers Ascendancy Chandra, Acolyte of Flame Chandra, Legacy of Fire Commodore Guff Dark Intimations Dovin, Grand Arbiter Elspeth Conquers Death Forge of Heroes Garruk, Cursed Huntsman Garruk, Unleashed Gatewatch Beacon Gideon's Company Gideon, Champion of Justice Grist, the Hunger Tide Heart of Kiran Huatli, Radiant Champion Jace's Projection Jeska, Thrice Reborn Kaito, Cunning Infiltrator Liliana's Scrounger Lolth, Spider Queen Mila, Crafty Companion Nissa of Shadowed Boughs Oath of Gideon Ral, Crackling Wit Ral, Leyline Prodigy Semester's End Spark Double Spark Double Teferi's Talent Teferi, Temporal Pilgrim Tezzeret, Cruel Captain Vivien's Talent
Some players in Commander even see them as a sort of status symbol and a perfect investment to round out the land base of a 2-color deck