Intrepid Stablemaster

Mana dorks have always been either color-locked or color-flexible, never both, and this one resolves the tension by splitting its output into two taps. The first is the plain green dork you already know. The second is the interesting half: two mana of any single color, spendable only to cast Mount or Vehicle spells. That casting restriction does the balancing work. A body that tapped for any color without strings would be a five-color engine worth building around; gating the wide-color output behind a specific card-type clause turns it into dedicated ramp for one archetype rather than a generic enabler. Note the scope precisely: the mana funds the spell, not the activated abilities that come after, so it will not cover a saddle or crew cost once the permanent is down. Reach and a 2/2 frame keep it relevant in combat on turns it is not being tapped, holding the ground against fliers while the deck sets up. Outside a shell packed with Mounts and Vehicles, its second ability never comes online and you are casting a green mana creature with reach; inside one, you are landing a larger Mount or Vehicle a full turn ahead of curve. It is a piece of ramp where the "tribe" being accelerated is a pair of card types rather than a creature type, and the accelerant only functions if you have already committed to those types.