Mabel, Heir to Cragflame (Showcase) (BLB-336) - Bloomburrow: (Showcase) (Borderless)

Other Mice you control get +1/+1.
When Mabel enters, create Cragflame, a legendary colorless Equipment artifact token with "Equipped creature gets +1/+1 and has vigilance, trample, and haste" and equip {2}.